3121440220879 has 2 divisors, whose sum is σ = 3121440220880. Its totient is φ = 3121440220878.

The previous prime is 3121440220859. The next prime is 3121440221047. The reversal of 3121440220879 is 9780220441213.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3121440220879 is a prime.

It is a super-2 number, since 2×3121440220879² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3121440220859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1560720110439 + 1560720110440.

It is an arithmetic number, because the mean of its divisors is an integer number (1560720110440).

Almost surely, 2^{3121440220879} is an apocalyptic number.

3121440220879 is a deficient number, since it is larger than the sum of its proper divisors (1).

3121440220879 is an equidigital number, since it uses as much as digits as its factorization.

3121440220879 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 193536, while the sum is 43.

The spelling of 3121440220879 in words is "three trillion, one hundred twenty-one billion, four hundred forty million, two hundred twenty thousand, eight hundred seventy-nine".