12131211213121 has 32 divisors (see below), whose sum is σ = 16289299547136. Its totient is φ = 8725082184000.

The previous prime is 12131211213067. The next prime is 12131211213127.

12131211213121 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 12131211213121 - 2²¹ = 12131209115969 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12131211213092 and 12131211213101.

It is not an unprimeable number, because it can be changed into a prime (12131211213127) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12889786 + ... + 13798876.

It is an arithmetic number, because the mean of its divisors is an integer number (509040610848).

Almost surely, 2^{12131211213121} is an apocalyptic number.

12131211213121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12131211213121 is a deficient number, since it is larger than the sum of its proper divisors (4158088334015).

12131211213121 is a wasteful number, since it uses less digits than its factorization.

12131211213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922453.

The product of its digits is 144, while the sum is 22.

Multiplying 12131211213121 by its sum of digits (22), we get a palindrome (266886646688662).

It can be divided in two parts, 1213121 and 1213121, that added together give a palindrome (2426242).

The spelling of 12131211213121 in words is "twelve trillion, one hundred thirty-one billion, two hundred eleven million, two hundred thirteen thousand, one hundred twenty-one".