13021123013 has 4 divisors (see below), whose sum is σ = 13234584108. Its totient is φ = 12807661920.

The previous prime is 13021123007. The next prime is 13021123019. The reversal of 13021123013 is 31032112031.

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

It is an interprime number because it is at equal distance from previous prime (13021123007) and next prime (13021123019).

It can be written as a sum of positive squares in 2 ways, for example, as 1597361089 + 11423761924 = 39967^2 + 106882^2 .

It is a cyclic number.

It is not a de Polignac number, because 13021123013 - 2⁶ = 13021122949 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13021122982 and 13021123000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13021123019) 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, 106730456 + ... + 106730577.

It is an arithmetic number, because the mean of its divisors is an integer number (3308646027).

Almost surely, 2^13021123013 is an apocalyptic number.

It is an amenable number.

13021123013 is a deficient number, since it is larger than the sum of its proper divisors (213461095).

13021123013 is an equidigital number, since it uses as much as digits as its factorization.

13021123013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213461094.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 13021123013 its reverse (31032112031), we get a palindrome (44053235044).

The spelling of 13021123013 in words is "thirteen billion, twenty-one million, one hundred twenty-three thousand, thirteen".