31122011113 has 16 divisors (see below), whose sum is σ = 32377233600. Its totient is φ = 29879196480.

The previous prime is 31122011111. The next prime is 31122011117. The reversal of 31122011113 is 31111022113.

It is a happy number.

It is not a de Polignac number, because 31122011113 - 2¹ = 31122011111 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31122011111) 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 15 ways as a sum of consecutive naturals, for example, 10945470 + ... + 10948312.

It is an arithmetic number, because the mean of its divisors is an integer number (2023577100).

Almost surely, 2^31122011113 is an apocalyptic number.

It is an amenable number.

31122011113 is a deficient number, since it is larger than the sum of its proper divisors (1255222487).

31122011113 is a wasteful number, since it uses less digits than its factorization.

31122011113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4872.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 31122011113 its reverse (31111022113), we get a palindrome (62233033226).

The spelling of 31122011113 in words is "thirty-one billion, one hundred twenty-two million, eleven thousand, one hundred thirteen".