31132122131111 has 4 divisors (see below), whose sum is σ = 31132550767032. Its totient is φ = 31131693495192.

The previous prime is 31132122131083. The next prime is 31132122131129. The reversal of 31132122131111 is 11113122123113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31132122131111 - 2²⁶ = 31132055022247 is a prime.

It is a super-2 number, since 2×31132122131111² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31132122130111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214208996 + ... + 214354281.

It is an arithmetic number, because the mean of its divisors is an integer number (7783137691758).

Almost surely, 2^{31132122131111} is an apocalyptic number.

31132122131111 is a deficient number, since it is larger than the sum of its proper divisors (428635921).

31132122131111 is an equidigital number, since it uses as much as digits as its factorization.

31132122131111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428635920.

The product of its digits is 216, while the sum is 23.

Adding to 31132122131111 its reverse (11113122123113), we get a palindrome (42245244254224).

The spelling of 31132122131111 in words is "thirty-one trillion, one hundred thirty-two billion, one hundred twenty-two million, one hundred thirty-one thousand, one hundred eleven".