31311120111 has 8 divisors (see below), whose sum is σ = 42432556464. Its totient is φ = 20531881920.

The previous prime is 31311120101. The next prime is 31311120133. The reversal of 31311120111 is 11102111313.

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

It is not a de Polignac number, because 31311120111 - 2¹³ = 31311111919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31311120101) 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, 85549326 + ... + 85549691.

It is an arithmetic number, because the mean of its divisors is an integer number (5304069558).

Almost surely, 2^31311120111 is an apocalyptic number.

31311120111 is a deficient number, since it is larger than the sum of its proper divisors (11121436353).

31311120111 is a wasteful number, since it uses less digits than its factorization.

31311120111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171099081.

The product of its (nonzero) digits is 18, while the sum is 15.

Adding to 31311120111 its reverse (11102111313), we get a palindrome (42413231424).

The spelling of 31311120111 in words is "thirty-one billion, three hundred eleven million, one hundred twenty thousand, one hundred eleven".