31112111013 has 24 divisors (see below), whose sum is σ = 44308641888. Its totient is φ = 19412954208.

The previous prime is 31112111011. The next prime is 31112111029. The reversal of 31112111013 is 31011121113.

It is not a de Polignac number, because 31112111013 - 2¹ = 31112111011 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31112110983 and 31112111001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31112111011) 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, 83170 + ... + 262947.

It is an arithmetic number, because the mean of its divisors is an integer number (1846193412).

Almost surely, 2^31112111013 is an apocalyptic number.

It is an amenable number.

31112111013 is a deficient number, since it is larger than the sum of its proper divisors (13196530875).

31112111013 is a wasteful number, since it uses less digits than its factorization.

31112111013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346241 (or 346222 counting only the distinct ones).

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

Adding to 31112111013 its reverse (31011121113), we get a palindrome (62123232126).

The spelling of 31112111013 in words is "thirty-one billion, one hundred twelve million, one hundred eleven thousand, thirteen".