31111113011 has 16 divisors (see below), whose sum is σ = 34188822528. Its totient is φ = 28075248000.

The previous prime is 31111112993. The next prime is 31111113097. The reversal of 31111113011 is 11031111113.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31111113011 is a prime.

It is a super-2 number, since 2×31111113011² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31111113511) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2596811 + ... + 2608763.

It is an arithmetic number, because the mean of its divisors is an integer number (2136801408).

Almost surely, 2^31111113011 is an apocalyptic number.

31111113011 is a deficient number, since it is larger than the sum of its proper divisors (3077709517).

31111113011 is a wasteful number, since it uses less digits than its factorization.

31111113011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13682.

The product of its (nonzero) digits is 9, while the sum is 14.

Adding to 31111113011 its reverse (11031111113), we get a palindrome (42142224124).

The spelling of 31111113011 in words is "thirty-one billion, one hundred eleven million, one hundred thirteen thousand, eleven".