21202313110111 has 16 divisors (see below), whose sum is σ = 24919140547584. Its totient is φ = 17663876309664.

The previous prime is 21202313110103. The next prime is 21202313110129. The reversal of 21202313110111 is 11101131320212.

It is not a de Polignac number, because 21202313110111 - 2³ = 21202313110103 is a prime.

It is a super-2 number, since 2×21202313110111² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202313110141) 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, 267012135 + ... + 267091528.

It is an arithmetic number, because the mean of its divisors is an integer number (1557446284224).

Almost surely, 2^{21202313110111} is an apocalyptic number.

21202313110111 is a deficient number, since it is larger than the sum of its proper divisors (3716827437473).

21202313110111 is a wasteful number, since it uses less digits than its factorization.

21202313110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534103830.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 21202313110111 its reverse (11101131320212), we get a palindrome (32303444430323).

It can be divided in two parts, 21202 and 313110111, that added together give a palindrome (313131313).

The spelling of 21202313110111 in words is "twenty-one trillion, two hundred two billion, three hundred thirteen million, one hundred ten thousand, one hundred eleven".