13031131022011 has 4 divisors (see below), whose sum is σ = 13046230827072. Its totient is φ = 13016031216952.

The previous prime is 13031131021999. The next prime is 13031131022051. The reversal of 13031131022011 is 11022013113031.

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 13031131022011 - 2²⁵ = 13031097467579 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13031131022011.

It is not an unprimeable number, because it can be changed into a prime (13031131022051) 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, 7549901236 + ... + 7549902961.

It is an arithmetic number, because the mean of its divisors is an integer number (3261557706768).

Almost surely, 2^{13031131022011} is an apocalyptic number.

13031131022011 is a deficient number, since it is larger than the sum of its proper divisors (15099805061).

13031131022011 is an equidigital number, since it uses as much as digits as its factorization.

13031131022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15099805060.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 13031131022011 its reverse (11022013113031), we get a palindrome (24053144135042).

The spelling of 13031131022011 in words is "thirteen trillion, thirty-one billion, one hundred thirty-one million, twenty-two thousand, eleven".