312103003010021 has 4 divisors (see below), whose sum is σ = 316378386612972. Its totient is φ = 307827619407072.

The previous prime is 312103003010011. The next prime is 312103003010069. The reversal of 312103003010021 is 120010300301213.

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 176663706420100 + 135439296589921 = 13291490^2 + 11637839^2 .

It is a cyclic number.

It is not a de Polignac number, because 312103003010021 - 2⁶ = 312103003009957 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 (312103003010011) 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, 2137691801366 + ... + 2137691801511.

It is an arithmetic number, because the mean of its divisors is an integer number (79094596653243).

Almost surely, 2^{312103003010021} is an apocalyptic number.

It is an amenable number.

312103003010021 is a deficient number, since it is larger than the sum of its proper divisors (4275383602951).

312103003010021 is an equidigital number, since it uses as much as digits as its factorization.

312103003010021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4275383602950.

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 312103003010021 its reverse (120010300301213), we get a palindrome (432113303311234).

The spelling of 312103003010021 in words is "three hundred twelve trillion, one hundred three billion, three million, ten thousand, twenty-one".