31111013001 has 4 divisors (see below), whose sum is σ = 41481350672. Its totient is φ = 20740675332.

The previous prime is 31111012981. The next prime is 31111013029. The reversal of 31111013001 is 10031011113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 31111013001 - 2⁵ = 31111012969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31111013071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5185168831 + ... + 5185168836.

It is an arithmetic number, because the mean of its divisors is an integer number (10370337668).

Almost surely, 2^31111013001 is an apocalyptic number.

It is an amenable number.

31111013001 is a deficient number, since it is larger than the sum of its proper divisors (10370337671).

31111013001 is a wasteful number, since it uses less digits than its factorization.

31111013001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10370337670.

The product of its (nonzero) digits is 9, while the sum is 12.

Adding to 31111013001 its reverse (10031011113), we get a palindrome (41142024114).

The spelling of 31111013001 in words is "thirty-one billion, one hundred eleven million, thirteen thousand, one".