31122104411111 has 24 divisors (see below), whose sum is σ = 37945595956320. Its totient is φ = 24999152412672.

The previous prime is 31122104411107. The next prime is 31122104411141. The reversal of 31122104411111 is 11111440122113.

It is not a de Polignac number, because 31122104411111 - 2² = 31122104411107 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31122104411141) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 32541806 + ... + 33484523.

It is an arithmetic number, because the mean of its divisors is an integer number (1581066498180).

Almost surely, 2^{31122104411111} is an apocalyptic number.

31122104411111 is a deficient number, since it is larger than the sum of its proper divisors (6823491545209).

31122104411111 is a wasteful number, since it uses less digits than its factorization.

31122104411111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66026603 (or 66026586 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 23.

Adding to 31122104411111 its reverse (11111440122113), we get a palindrome (42233544533224).

The spelling of 31122104411111 in words is "thirty-one trillion, one hundred twenty-two billion, one hundred four million, four hundred eleven thousand, one hundred eleven".