31312123010219 has 2 divisors, whose sum is σ = 31312123010220. Its totient is φ = 31312123010218.

The previous prime is 31312123010171. The next prime is 31312123010339. The reversal of 31312123010219 is 91201032121313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31312123010219 - 2⁸ = 31312123009963 is a prime.

It is a super-2 number, since 2×31312123010219² (a number of 28 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 31312123010191 and 31312123010200.

It is not a weakly prime, because it can be changed into another prime (31312123013219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15656061505109 + 15656061505110.

It is an arithmetic number, because the mean of its divisors is an integer number (15656061505110).

Almost surely, 2^{31312123010219} is an apocalyptic number.

31312123010219 is a deficient number, since it is larger than the sum of its proper divisors (1).

31312123010219 is an equidigital number, since it uses as much as digits as its factorization.

31312123010219 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1944, while the sum is 29.

The spelling of 31312123010219 in words is "thirty-one trillion, three hundred twelve billion, one hundred twenty-three million, ten thousand, two hundred nineteen".