131312123121 has 8 divisors (see below), whose sum is σ = 175113836064. Its totient is φ = 87525912800.

The previous prime is 131312123113. The next prime is 131312123123. The reversal of 131312123121 is 121321213131.

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

It is a cyclic number.

It is not a de Polignac number, because 131312123121 - 2³ = 131312123113 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (131312123123) 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, 3855876 + ... + 3889781.

It is an arithmetic number, because the mean of its divisors is an integer number (21889229508).

Almost surely, 2^131312123121 is an apocalyptic number.

It is an amenable number.

131312123121 is a deficient number, since it is larger than the sum of its proper divisors (43801712943).

131312123121 is an equidigital number, since it uses as much as digits as its factorization.

131312123121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7751311.

The product of its digits is 216, while the sum is 21.

Adding to 131312123121 its reverse (121321213131), we get a palindrome (252633336252).

The spelling of 131312123121 in words is "one hundred thirty-one billion, three hundred twelve million, one hundred twenty-three thousand, one hundred twenty-one".