13121204131 has 8 divisors (see below), whose sum is σ = 14998241024. Its totient is φ = 11244812040.

The previous prime is 13121204113. The next prime is 13121204141. The reversal of 13121204131 is 13140212131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13121204131 - 2⁷ = 13121204003 is a prime.

It is a super-2 number, since 2×13121204131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13121204099 and 13121204108.

It is not an unprimeable number, because it can be changed into a prime (13121204141) 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, 116775 + ... + 199696.

It is an arithmetic number, because the mean of its divisors is an integer number (1874780128).

Almost surely, 2^13121204131 is an apocalyptic number.

13121204131 is a deficient number, since it is larger than the sum of its proper divisors (1877036893).

13121204131 is an equidigital number, since it uses as much as digits as its factorization.

13121204131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322401.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 13121204131 its reverse (13140212131), we get a palindrome (26261416262).

The spelling of 13121204131 in words is "thirteen billion, one hundred twenty-one million, two hundred four thousand, one hundred thirty-one".