312121323101 has 4 divisors (see below), whose sum is σ = 356710083552. Its totient is φ = 267532562652.

The previous prime is 312121323079. The next prime is 312121323181. The reversal of 312121323101 is 101323121213.

It is a happy number.

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 312121323101 - 2⁶ = 312121323037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312121323181) 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, 22294380215 + ... + 22294380228.

It is an arithmetic number, because the mean of its divisors is an integer number (89177520888).

Almost surely, 2^312121323101 is an apocalyptic number.

It is an amenable number.

312121323101 is a deficient number, since it is larger than the sum of its proper divisors (44588760451).

312121323101 is an equidigital number, since it uses as much as digits as its factorization.

312121323101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44588760450.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 312121323101 its reverse (101323121213), we get a palindrome (413444444314).

The spelling of 312121323101 in words is "three hundred twelve billion, one hundred twenty-one million, three hundred twenty-three thousand, one hundred one".