131212012132121 has 4 divisors (see below), whose sum is σ = 133435944541200. Its totient is φ = 128988079723044.

The previous prime is 131212012132109. The next prime is 131212012132147. The reversal of 131212012132121 is 121231210212131.

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 131212012132121 - 2¹⁸ = 131212011869977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131212012132171) 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, 1111966204451 + ... + 1111966204568.

It is an arithmetic number, because the mean of its divisors is an integer number (33358986135300).

Almost surely, 2^{131212012132121} is an apocalyptic number.

It is an amenable number.

131212012132121 is a deficient number, since it is larger than the sum of its proper divisors (2223932409079).

131212012132121 is an equidigital number, since it uses as much as digits as its factorization.

131212012132121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223932409078.

The product of its (nonzero) digits is 288, while the sum is 23.

Adding to 131212012132121 its reverse (121231210212131), we get a palindrome (252443222344252).

The spelling of 131212012132121 in words is "one hundred thirty-one trillion, two hundred twelve billion, twelve million, one hundred thirty-two thousand, one hundred twenty-one".