13012111130021 has 4 divisors (see below), whose sum is σ = 13012903746252. Its totient is φ = 13011318513792.

The previous prime is 13012111130017. The next prime is 13012111130077. The reversal of 13012111130021 is 12003111121031.

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 8112750227521 + 4899360902500 = 2848289^2 + 2213450^2 .

It is a cyclic number.

It is not a de Polignac number, because 13012111130021 - 2² = 13012111130017 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13012111130521) 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, 396283490 + ... + 396316323.

It is an arithmetic number, because the mean of its divisors is an integer number (3253225936563).

Almost surely, 2^{13012111130021} is an apocalyptic number.

It is an amenable number.

13012111130021 is a deficient number, since it is larger than the sum of its proper divisors (792616231).

13012111130021 is an equidigital number, since it uses as much as digits as its factorization.

13012111130021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 792616230.

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

Adding to 13012111130021 its reverse (12003111121031), we get a palindrome (25015222251052).

The spelling of 13012111130021 in words is "thirteen trillion, twelve billion, one hundred eleven million, one hundred thirty thousand, twenty-one".