312120030613 has 2 divisors, whose sum is σ = 312120030614. Its totient is φ = 312120030612.

The previous prime is 312120030601. The next prime is 312120030637. The reversal of 312120030613 is 316030021213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169676438724 + 142443591889 = 411918^2 + 377417^2 .

It is an emirp because it is prime and its reverse (316030021213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 312120030613 - 2²¹ = 312117933461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (312120030643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156060015306 + 156060015307.

It is an arithmetic number, because the mean of its divisors is an integer number (156060015307).

Almost surely, 2^312120030613 is an apocalyptic number.

It is an amenable number.

312120030613 is a deficient number, since it is larger than the sum of its proper divisors (1).

312120030613 is an equidigital number, since it uses as much as digits as its factorization.

312120030613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 312120030613 its reverse (316030021213), we get a palindrome (628150051826).

The spelling of 312120030613 in words is "three hundred twelve billion, one hundred twenty million, thirty thousand, six hundred thirteen".