21023311312202 has 16 divisors (see below), whose sum is σ = 34841702636352. Its totient is φ = 9463178493120.

The previous prime is 21023311312193. The next prime is 21023311312207. The reversal of 21023311312202 is 20221311332012.

It is a super-2 number, since 2×21023311312202² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is not an unprimeable number, because it can be changed into a prime (21023311312207) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13442014124 + ... + 13442015687.

It is an arithmetic number, because the mean of its divisors is an integer number (2177606414772).

Almost surely, 2^{21023311312202} is an apocalyptic number.

21023311312202 is a deficient number, since it is larger than the sum of its proper divisors (13818391324150).

21023311312202 is a wasteful number, since it uses less digits than its factorization.

21023311312202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26884029853.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21023311312202 its reverse (20221311332012), we get a palindrome (41244622644214).

The spelling of 21023311312202 in words is "twenty-one trillion, twenty-three billion, three hundred eleven million, three hundred twelve thousand, two hundred two".