11231031120013 has 4 divisors (see below), whose sum is σ = 11504958708348. Its totient is φ = 10957103531680.

The previous prime is 11231031119923. The next prime is 11231031120041. The reversal of 11231031120013 is 31002113013211.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6425829546084 + 4805201573929 = 2534922^2 + 2192077^2 .

It is a cyclic number.

It is not a de Polignac number, because 11231031120013 - 2²¹ = 11231029022861 is a prime.

It is a super-2 number, since 2×11231031120013² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231031120613) 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, 136963794106 + ... + 136963794187.

It is an arithmetic number, because the mean of its divisors is an integer number (2876239677087).

Almost surely, 2^{11231031120013} is an apocalyptic number.

It is an amenable number.

11231031120013 is a deficient number, since it is larger than the sum of its proper divisors (273927588335).

11231031120013 is an equidigital number, since it uses as much as digits as its factorization.

11231031120013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 273927588334.

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

Adding to 11231031120013 its reverse (31002113013211), we get a palindrome (42233144133224).

The spelling of 11231031120013 in words is "eleven trillion, two hundred thirty-one billion, thirty-one million, one hundred twenty thousand, thirteen".