13120031011 has 4 divisors (see below), whose sum is σ = 13120269624. Its totient is φ = 13119792400.

The previous prime is 13120031003. The next prime is 13120031051. The reversal of 13120031011 is 11013002131.

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 13120031011 - 2³ = 13120031003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13120030982 and 13120031000.

It is not an unprimeable number, because it can be changed into a prime (13120031051) 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, 9591 + ... + 162271.

It is an arithmetic number, because the mean of its divisors is an integer number (3280067406).

Almost surely, 2^13120031011 is an apocalyptic number.

13120031011 is a deficient number, since it is larger than the sum of its proper divisors (238613).

13120031011 is an equidigital number, since it uses as much as digits as its factorization.

13120031011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 238612.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 13120031011 its reverse (11013002131), we get a palindrome (24133033142).

The spelling of 13120031011 in words is "thirteen billion, one hundred twenty million, thirty-one thousand, eleven".