21126052631 has 2 divisors, whose sum is σ = 21126052632. Its totient is φ = 21126052630.

The previous prime is 21126052579. The next prime is 21126052669. The reversal of 21126052631 is 13625062112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21126052631 - 2⁶ = 21126052567 is a prime.

It is a super-2 number, since 2×21126052631² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21126052594 and 21126052603.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21126052931) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10563026315 + 10563026316.

It is an arithmetic number, because the mean of its divisors is an integer number (10563026316).

Almost surely, 2^21126052631 is an apocalyptic number.

21126052631 is a deficient number, since it is larger than the sum of its proper divisors (1).

21126052631 is an equidigital number, since it uses as much as digits as its factorization.

21126052631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 21126052631 in words is "twenty-one billion, one hundred twenty-six million, fifty-two thousand, six hundred thirty-one".