1217518345122 has 32 divisors (see below), whose sum is σ = 2437034897472. Its totient is φ = 405506533824.

The previous prime is 1217518345097. The next prime is 1217518345151. The reversal of 1217518345122 is 2215438157121.

It is a super-2 number, since 2×1217518345122² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52474428 + ... + 52497624.

It is an arithmetic number, because the mean of its divisors is an integer number (76157340546).

Almost surely, 2^{1217518345122} is an apocalyptic number.

1217518345122 is an abundant number, since it is smaller than the sum of its proper divisors (1219516552350).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1217518345122 is a wasteful number, since it uses less digits than its factorization.

1217518345122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30002.

The product of its digits is 134400, while the sum is 42.

The spelling of 1217518345122 in words is "one trillion, two hundred seventeen billion, five hundred eighteen million, three hundred forty-five thousand, one hundred twenty-two".