21101012111131 has 2 divisors, whose sum is σ = 21101012111132. Its totient is φ = 21101012111130.

The previous prime is 21101012111093. The next prime is 21101012111159. The reversal of 21101012111131 is 13111121010112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21101012111131 - 2²⁹ = 21100475240219 is a prime.

It is a super-2 number, since 2×21101012111131² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21101012111731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10550506055565 + 10550506055566.

It is an arithmetic number, because the mean of its divisors is an integer number (10550506055566).

Almost surely, 2^{21101012111131} is an apocalyptic number.

21101012111131 is a deficient number, since it is larger than the sum of its proper divisors (1).

21101012111131 is an equidigital number, since it uses as much as digits as its factorization.

21101012111131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 21101012111131 its reverse (13111121010112), we get a palindrome (34212133121243).

The spelling of 21101012111131 in words is "twenty-one trillion, one hundred one billion, twelve million, one hundred eleven thousand, one hundred thirty-one".