21002200100331 has 16 divisors (see below), whose sum is σ = 30758370858240. Its totient is φ = 12687827977440.

The previous prime is 21002200100311. The next prime is 21002200100341. The reversal of 21002200100331 is 13300100220012.

It is not a de Polignac number, because 21002200100331 - 2⁹ = 21002200099819 is a prime.

It is a super-2 number, since 2×21002200100331² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21002200100331.

It is not an unprimeable number, because it can be changed into a prime (21002200100311) 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, 8009991100 + ... + 8009993721.

It is an arithmetic number, because the mean of its divisors is an integer number (1922398178640).

Almost surely, 2^{21002200100331} is an apocalyptic number.

21002200100331 is a deficient number, since it is larger than the sum of its proper divisors (9756170757909).

21002200100331 is a wasteful number, since it uses less digits than its factorization.

21002200100331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16019984866.

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 21002200100331 its reverse (13300100220012), we get a palindrome (34302300320343).

The spelling of 21002200100331 in words is "twenty-one trillion, two billion, two hundred million, one hundred thousand, three hundred thirty-one".