31020012111 has 8 divisors (see below), whose sum is σ = 45120017664. Its totient is φ = 18800007320.

The previous prime is 31020012073. The next prime is 31020012151. The reversal of 31020012111 is 11121002013.

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 31020012111 - 2⁹ = 31020011599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31020012151) 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, 470000151 + ... + 470000216.

It is an arithmetic number, because the mean of its divisors is an integer number (5640002208).

Almost surely, 2^31020012111 is an apocalyptic number.

31020012111 is a deficient number, since it is larger than the sum of its proper divisors (14100005553).

31020012111 is a wasteful number, since it uses less digits than its factorization.

31020012111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 940000381.

The product of its (nonzero) digits is 12, while the sum is 12.

Adding to 31020012111 its reverse (11121002013), we get a palindrome (42141014124).

The spelling of 31020012111 in words is "thirty-one billion, twenty million, twelve thousand, one hundred eleven".