13011031021121 has 8 divisors (see below), whose sum is σ = 15173214019200. Its totient is φ = 11152312303524.

The previous prime is 13011031021117. The next prime is 13011031021123. The reversal of 13011031021121 is 12112013011031.

It is not a de Polignac number, because 13011031021121 - 2² = 13011031021117 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 13011031021121.

It is not an unprimeable number, because it can be changed into a prime (13011031021123) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18966517181 + ... + 18966517866.

It is an arithmetic number, because the mean of its divisors is an integer number (1896651752400).

Almost surely, 2^{13011031021121} is an apocalyptic number.

It is an amenable number.

13011031021121 is a deficient number, since it is larger than the sum of its proper divisors (2162182998079).

13011031021121 is an frugal number, since it uses more digits than its factorization.

13011031021121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37933035068 (or 37933035054 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 13011031021121 its reverse (12112013011031), we get a palindrome (25123044032152).

The spelling of 13011031021121 in words is "thirteen trillion, eleven billion, thirty-one million, twenty-one thousand, one hundred twenty-one".