21101231132131 has 2 divisors, whose sum is σ = 21101231132132. Its totient is φ = 21101231132130.

The previous prime is 21101231132041. The next prime is 21101231132143. The reversal of 21101231132131 is 13123113210112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21101231132131 is a prime.

It is a super-2 number, since 2×21101231132131² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21101231132171) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550615566065 + 10550615566066.

It is an arithmetic number, because the mean of its divisors is an integer number (10550615566066).

Almost surely, 2^{21101231132131} is an apocalyptic number.

21101231132131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101231132131 is an equidigital number, since it uses as much as digits as its factorization.

21101231132131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 21101231132131 its reverse (13123113210112), we get a palindrome (34224344342243).

The spelling of 21101231132131 in words is "twenty-one trillion, one hundred one billion, two hundred thirty-one million, one hundred thirty-two thousand, one hundred thirty-one".