20010011112221 has 8 divisors (see below), whose sum is σ = 21549349611384. Its totient is φ = 18470687880960.

The previous prime is 20010011112211. The next prime is 20010011112239. The reversal of 20010011112221 is 12221111001002.

It can be written as a sum of positive squares in 4 ways, for example, as 769628971225 + 19240382140996 = 877285^2 + 4386386^2 .

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 20010011112221 - 2⁴² = 15611964601117 is a prime.

It is a super-2 number, since 2×20010011112221² (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 = 20010011112196 and 20010011112205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20010011112211) 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 7 ways as a sum of consecutive naturals, for example, 1019000 + ... + 6407681.

It is an arithmetic number, because the mean of its divisors is an integer number (2693668701423).

Almost surely, 2^{20010011112221} is an apocalyptic number.

It is an amenable number.

20010011112221 is a deficient number, since it is larger than the sum of its proper divisors (1539338499163).

20010011112221 is a wasteful number, since it uses less digits than its factorization.

20010011112221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7633951.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 20010011112221 its reverse (12221111001002), we get a palindrome (32231122113223).

The spelling of 20010011112221 in words is "twenty trillion, ten billion, eleven million, one hundred twelve thousand, two hundred twenty-one".