312021020120213 has 4 divisors (see below), whose sum is σ = 312022783795308. Its totient is φ = 312019256445120.

The previous prime is 312021020120197. The next prime is 312021020120219.

312021020120213 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 231340510453924 + 80680509666289 = 15209882^2 + 8982233^2 .

It is a cyclic number.

It is not a de Polignac number, because 312021020120213 - 2⁴ = 312021020120197 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 (312021020120219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 881572148 + ... + 881926013.

It is an arithmetic number, because the mean of its divisors is an integer number (78005695948827).

Almost surely, 2^{312021020120213} is an apocalyptic number.

It is an amenable number.

312021020120213 is a deficient number, since it is larger than the sum of its proper divisors (1763675095).

312021020120213 is a wasteful number, since it uses less digits than its factorization.

312021020120213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1763675094.

The product of its (nonzero) digits is 288, while the sum is 20.

The spelling of 312021020120213 in words is "three hundred twelve trillion, twenty-one billion, twenty million, one hundred twenty thousand, two hundred thirteen".