2116217555122 has 48 divisors (see below), whose sum is σ = 3525851896056. Its totient is φ = 951798988800.

The previous prime is 2116217555057. The next prime is 2116217555167. The reversal of 2116217555122 is 2215557126112.

It can be written as a sum of positive squares in 4 ways, for example, as 1334812826281 + 781404728841 = 1155341^2 + 883971^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202833618 + ... + 202844050.

Almost surely, 2^{2116217555122} is an apocalyptic number.

2116217555122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2116217555122 is a deficient number, since it is larger than the sum of its proper divisors (1409634340934).

2116217555122 is a wasteful number, since it uses less digits than its factorization.

2116217555122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19195 (or 19184 counting only the distinct ones).

The product of its digits is 84000, while the sum is 40.

The spelling of 2116217555122 in words is "two trillion, one hundred sixteen billion, two hundred seventeen million, five hundred fifty-five thousand, one hundred twenty-two".