21002232120331 has 16 divisors (see below), whose sum is σ = 27724871738880. Its totient is φ = 15402706519680.

The previous prime is 21002232120313. The next prime is 21002232120341. The reversal of 21002232120331 is 13302123220012.

It is a cyclic number.

It is not a de Polignac number, because 21002232120331 - 2²⁵ = 21002198565899 is a prime.

It is a super-2 number, since 2×21002232120331² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21002232120301) 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, 8022241671 + ... + 8022244288.

It is an arithmetic number, because the mean of its divisors is an integer number (1732804483680).

Almost surely, 2^{21002232120331} is an apocalyptic number.

21002232120331 is a deficient number, since it is larger than the sum of its proper divisors (6722639618549).

21002232120331 is a wasteful number, since it uses less digits than its factorization.

21002232120331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16044485994.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21002232120331 its reverse (13302123220012), we get a palindrome (34304355340343).

The spelling of 21002232120331 in words is "twenty-one trillion, two billion, two hundred thirty-two million, one hundred twenty thousand, three hundred thirty-one".