31131130011 has 4 divisors (see below), whose sum is σ = 41508173352. Its totient is φ = 20754086672.

The previous prime is 31131130003. The next prime is 31131130021. The reversal of 31131130011 is 11003113113.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31131130011 - 2³ = 31131130003 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31131130001) 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, 5188521666 + ... + 5188521671.

It is an arithmetic number, because the mean of its divisors is an integer number (10377043338).

Almost surely, 2^31131130011 is an apocalyptic number.

31131130011 is a deficient number, since it is larger than the sum of its proper divisors (10377043341).

31131130011 is a wasteful number, since it uses less digits than its factorization.

31131130011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10377043340.

The product of its (nonzero) digits is 27, while the sum is 15.

Adding to 31131130011 its reverse (11003113113), we get a palindrome (42134243124).

The spelling of 31131130011 in words is "thirty-one billion, one hundred thirty-one million, one hundred thirty thousand, eleven".