21112111033131 has 32 divisors (see below), whose sum is σ = 28721794901760. Its totient is φ = 13790405059200.

The previous prime is 21112111033127. The next prime is 21112111033157. The reversal of 21112111033131 is 13133011121112.

It is not a de Polignac number, because 21112111033131 - 2² = 21112111033127 is a prime.

It is a super-2 number, since 2×21112111033131² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21112111033098 and 21112111033107.

It is not an unprimeable number, because it can be changed into a prime (21112111533131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 155868985 + ... + 156004373.

It is an arithmetic number, because the mean of its divisors is an integer number (897556090680).

Almost surely, 2^{21112111033131} is an apocalyptic number.

21112111033131 is a deficient number, since it is larger than the sum of its proper divisors (7609683868629).

21112111033131 is a wasteful number, since it uses less digits than its factorization.

21112111033131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138747.

The product of its (nonzero) digits is 108, while the sum is 21.

Adding to 21112111033131 its reverse (13133011121112), we get a palindrome (34245122154243).

The spelling of 21112111033131 in words is "twenty-one trillion, one hundred twelve billion, one hundred eleven million, thirty-three thousand, one hundred thirty-one".