13331121020021 has 64 divisors (see below), whose sum is σ = 16380102942720. Its totient is φ = 10590289920000.

The previous prime is 13331121019991. The next prime is 13331121020057. The reversal of 13331121020021 is 12002012113331.

It is a happy number.

It is not a de Polignac number, because 13331121020021 - 2²² = 13331116825717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13331121019975 and 13331121020002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13331121020071) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3966413381 + ... + 3966416741.

It is an arithmetic number, because the mean of its divisors is an integer number (255939108480).

Almost surely, 2^{13331121020021} is an apocalyptic number.

It is an amenable number.

13331121020021 is a deficient number, since it is larger than the sum of its proper divisors (3048981922699).

13331121020021 is a wasteful number, since it uses less digits than its factorization.

13331121020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5286.

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

Adding to 13331121020021 its reverse (12002012113331), we get a palindrome (25333133133352).

The spelling of 13331121020021 in words is "thirteen trillion, three hundred thirty-one billion, one hundred twenty-one million, twenty thousand, twenty-one".