312131242121 has 8 divisors (see below), whose sum is σ = 312764187264. Its totient is φ = 311498525520.

The previous prime is 312131242081. The next prime is 312131242141. The reversal of 312131242121 is 121242131213.

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 312131242121 - 2⁶ = 312131242057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (312131242141) 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, 2823536 + ... + 2931998.

It is an arithmetic number, because the mean of its divisors is an integer number (39095523408).

Almost surely, 2^312131242121 is an apocalyptic number.

It is an amenable number.

312131242121 is a deficient number, since it is larger than the sum of its proper divisors (632945143).

312131242121 is a wasteful number, since it uses less digits than its factorization.

312131242121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114271.

The product of its digits is 576, while the sum is 23.

Adding to 312131242121 its reverse (121242131213), we get a palindrome (433373373334).

The spelling of 312131242121 in words is "three hundred twelve billion, one hundred thirty-one million, two hundred forty-two thousand, one hundred twenty-one".