121912778793339 has 8 divisors (see below), whose sum is σ = 180611524138320. Its totient is φ = 81275185862208.

The previous prime is 121912778793329. The next prime is 121912778793349. The reversal of 121912778793339 is 933397877219121.

121912778793339 is a `hidden beast` number, since 1 + 2 + 1 + 9 + 127 + 7 + 87 + 93 + 339 = 666.

It is an interprime number because it is at equal distance from previous prime (121912778793329) and next prime (121912778793349).

It is a de Polignac number, because none of the positive numbers 2^k-121912778793339 is a prime.

It is a super-2 number, since 2×121912778793339² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (121912778793329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2257644051702 + ... + 2257644051755.

It is an arithmetic number, because the mean of its divisors is an integer number (22576440517290).

Almost surely, 2^{121912778793339} is an apocalyptic number.

121912778793339 is a deficient number, since it is larger than the sum of its proper divisors (58698745344981).

121912778793339 is an equidigital number, since it uses as much as digits as its factorization.

121912778793339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4515288103466 (or 4515288103460 counting only the distinct ones).

The product of its digits is 216040608, while the sum is 72.

The spelling of 121912778793339 in words is "one hundred twenty-one trillion, nine hundred twelve billion, seven hundred seventy-eight million, seven hundred ninety-three thousand, three hundred thirty-nine".