13131020104 has 8 divisors (see below), whose sum is σ = 24620662710. Its totient is φ = 6565510048.

The previous prime is 13131020087. The next prime is 13131020107. The reversal of 13131020104 is 40102013131.

It can be written as a sum of positive squares in only one way, i.e., 10301844004 + 2829176100 = 101498^2 + 53190^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (13131020107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 820688749 + ... + 820688764.

Almost surely, 2^13131020104 is an apocalyptic number.

It is an amenable number.

13131020104 is a deficient number, since it is larger than the sum of its proper divisors (11489642606).

13131020104 is a wasteful number, since it uses less digits than its factorization.

13131020104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1641377519 (or 1641377515 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 13131020104 its reverse (40102013131), we get a palindrome (53233033235).

The spelling of 13131020104 in words is "thirteen billion, one hundred thirty-one million, twenty thousand, one hundred four".