31112313211 has 8 divisors (see below), whose sum is σ = 37428346880. Its totient is φ = 25264133928.

The previous prime is 31112313157. The next prime is 31112313227. The reversal of 31112313211 is 11231321113.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31112313211 - 2⁷ = 31112313083 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31112313511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116963451 + ... + 116963716.

It is an arithmetic number, because the mean of its divisors is an integer number (4678543360).

Almost surely, 2^31112313211 is an apocalyptic number.

31112313211 is a deficient number, since it is larger than the sum of its proper divisors (6316033669).

31112313211 is a wasteful number, since it uses less digits than its factorization.

31112313211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233927193.

The product of its digits is 108, while the sum is 19.

Adding to 31112313211 its reverse (11231321113), we get a palindrome (42343634324).

The spelling of 31112313211 in words is "thirty-one billion, one hundred twelve million, three hundred thirteen thousand, two hundred eleven".