313012020121 has 4 divisors (see below), whose sum is σ = 313013351952. Its totient is φ = 313010688292.

The previous prime is 313012020077. The next prime is 313012020149. The reversal of 313012020121 is 121020210313.

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 313012020121 - 2⁷ = 313012019993 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 313012020095 and 313012020104.

It is not an unprimeable number, because it can be changed into a prime (313012020151) 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, 208771 + ... + 818296.

It is an arithmetic number, because the mean of its divisors is an integer number (78253337988).

Almost surely, 2^313012020121 is an apocalyptic number.

It is an amenable number.

313012020121 is a deficient number, since it is larger than the sum of its proper divisors (1331831).

313012020121 is a wasteful number, since it uses less digits than its factorization.

313012020121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331830.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 313012020121 its reverse (121020210313), we get a palindrome (434032230434).

The spelling of 313012020121 in words is "three hundred thirteen billion, twelve million, twenty thousand, one hundred twenty-one".