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21224032520231 = 200310596122077
BaseRepresentation
bin1001101001101100110101…
…11010110100100000100111
32210010222221022121010201002
410310312122322310200213
510240213304311121411
6113050104055023515
74320246211541402
oct464663272644047
983128838533632
1021224032520231
1168430750592a2
12246943966ab9b
13bac557842bc8
1453536a448d39
1526c14483833b
hex134d9aeb4827

21224032520231 has 4 divisors (see below), whose sum is σ = 21234628644312. Its totient is φ = 21213436396152.

The previous prime is 21224032520221. The next prime is 21224032520233. The reversal of 21224032520231 is 13202523042212.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21224032520231 - 214 = 21224032503847 is a prime.

It is a super-2 number, since 2×212240325202312 (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21224032520194 and 21224032520203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21224032520233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5298059036 + ... + 5298063041.

It is an arithmetic number, because the mean of its divisors is an integer number (5308657161078).

Almost surely, 221224032520231 is an apocalyptic number.

21224032520231 is a deficient number, since it is larger than the sum of its proper divisors (10596124081).

21224032520231 is a wasteful number, since it uses less digits than its factorization.

21224032520231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10596124080.

The product of its (nonzero) digits is 11520, while the sum is 29.

Adding to 21224032520231 its reverse (13202523042212), we get a palindrome (34426555562443).

The spelling of 21224032520231 in words is "twenty-one trillion, two hundred twenty-four billion, thirty-two million, five hundred twenty thousand, two hundred thirty-one".

Divisors: 1 2003 10596122077 21224032520231