131212013122321 has 4 divisors (see below), whose sum is σ = 135444658706944. Its totient is φ = 126979367537700.

The previous prime is 131212013122313. The next prime is 131212013122327. The reversal of 131212013122321 is 123221310212131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131212013122321 - 2³ = 131212013122313 is a prime.

It is a super-2 number, since 2×131212013122321² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131212013122327) 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, 2116322792265 + ... + 2116322792326.

It is an arithmetic number, because the mean of its divisors is an integer number (33861164676736).

Almost surely, 2^{131212013122321} is an apocalyptic number.

It is an amenable number.

131212013122321 is a deficient number, since it is larger than the sum of its proper divisors (4232645584623).

131212013122321 is an equidigital number, since it uses as much as digits as its factorization.

131212013122321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4232645584622.

The product of its (nonzero) digits is 864, while the sum is 25.

Adding to 131212013122321 its reverse (123221310212131), we get a palindrome (254433323334452).

The spelling of 131212013122321 in words is "one hundred thirty-one trillion, two hundred twelve billion, thirteen million, one hundred twenty-two thousand, three hundred twenty-one".