21000112002131 has 2 divisors, whose sum is σ = 21000112002132. Its totient is φ = 21000112002130.

The previous prime is 21000112002127. The next prime is 21000112002143. The reversal of 21000112002131 is 13120021100012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21000112002131 - 2² = 21000112002127 is a prime.

It is a super-2 number, since 2×21000112002131² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21000112002431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500056001065 + 10500056001066.

It is an arithmetic number, because the mean of its divisors is an integer number (10500056001066).

Almost surely, 2^{21000112002131} is an apocalyptic number.

21000112002131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000112002131 is an equidigital number, since it uses as much as digits as its factorization.

21000112002131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 21000112002131 its reverse (13120021100012), we get a palindrome (34120133102143).

The spelling of 21000112002131 in words is "twenty-one trillion, one hundred twelve million, two thousand, one hundred thirty-one".