20113310231021 has 16 divisors (see below), whose sum is σ = 23047253923200. Its totient is φ = 17194525812288.

The previous prime is 20113310230999. The next prime is 20113310231039. The reversal of 20113310231021 is 12013201331102.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 20113310231021 - 2³⁰ = 20112236489197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20113310230984 and 20113310231002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20113310230021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42359795 + ... + 42831983.

It is an arithmetic number, because the mean of its divisors is an integer number (1440453370200).

Almost surely, 2^{20113310231021} is an apocalyptic number.

It is an amenable number.

20113310231021 is a deficient number, since it is larger than the sum of its proper divisors (2933943692179).

20113310231021 is a wasteful number, since it uses less digits than its factorization.

20113310231021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488228.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 20113310231021 its reverse (12013201331102), we get a palindrome (32126511562123).

The spelling of 20113310231021 in words is "twenty trillion, one hundred thirteen billion, three hundred ten million, two hundred thirty-one thousand, twenty-one".