21110202123131 has 16 divisors (see below), whose sum is σ = 23267864964960. Its totient is φ = 18992317562880.

The previous prime is 21110202123097. The next prime is 21110202123139. The reversal of 21110202123131 is 13132120201112.

It is a cyclic number.

It is not a de Polignac number, because 21110202123131 - 2⁴² = 16712155612027 is a prime.

It is a super-2 number, since 2×21110202123131² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21110202123139) 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, 21823715 + ... + 22770483.

It is an arithmetic number, because the mean of its divisors is an integer number (1454241560310).

Almost surely, 2^{21110202123131} is an apocalyptic number.

21110202123131 is a deficient number, since it is larger than the sum of its proper divisors (2157662841829).

21110202123131 is a wasteful number, since it uses less digits than its factorization.

21110202123131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 967774.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 21110202123131 its reverse (13132120201112), we get a palindrome (34242322324243).

The spelling of 21110202123131 in words is "twenty-one trillion, one hundred ten billion, two hundred two million, one hundred twenty-three thousand, one hundred thirty-one".