31020113111 has 8 divisors (see below), whose sum is σ = 33972484560. Its totient is φ = 28148628672.

The previous prime is 31020113099. The next prime is 31020113147. The reversal of 31020113111 is 11131102013.

It is a happy number.

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 31020113111 - 2¹⁴ = 31020096727 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 (31020113611) 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, 20220950 + ... + 20222483.

It is an arithmetic number, because the mean of its divisors is an integer number (4246560570).

Almost surely, 2^31020113111 is an apocalyptic number.

31020113111 is a deficient number, since it is larger than the sum of its proper divisors (2952371449).

31020113111 is a wasteful number, since it uses less digits than its factorization.

31020113111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40443505.

The product of its (nonzero) digits is 18, while the sum is 14.

Adding to 31020113111 its reverse (11131102013), we get a palindrome (42151215124).

The spelling of 31020113111 in words is "thirty-one billion, twenty million, one hundred thirteen thousand, one hundred eleven".