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21213543315001 = 312341292314331
BaseRepresentation
bin1001101001011001010011…
…01101101011011000111001
32210002222212022022022011111
410310230221231223120321
510240030314042040001
6113041211155000321
74316425244012212
oct464545155533071
983088768268144
1021213543315001
116839682190144
1224673b08990a1
13bab5756acbab
14534a53340409
1526bc2da45851
hex134b29b6b639

21213543315001 has 8 divisors (see below), whose sum is σ = 21907205297408. Its totient is φ = 20520465966000.

The previous prime is 21213543314923. The next prime is 21213543315053. The reversal of 21213543315001 is 10051334531212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21213543315001 - 29 = 21213543314489 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21213543315301) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146084595 + ... + 146229736.

It is an arithmetic number, because the mean of its divisors is an integer number (2738400662176).

Almost surely, 221213543315001 is an apocalyptic number.

It is an amenable number.

21213543315001 is a deficient number, since it is larger than the sum of its proper divisors (693661982407).

21213543315001 is a wasteful number, since it uses less digits than its factorization.

21213543315001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292316703.

The product of its (nonzero) digits is 10800, while the sum is 31.

Adding to 21213543315001 its reverse (10051334531212), we get a palindrome (31264877846213).

The spelling of 21213543315001 in words is "twenty-one trillion, two hundred thirteen billion, five hundred forty-three million, three hundred fifteen thousand, one".

Divisors: 1 31 2341 72571 292314331 9061744261 684307848871 21213543315001