216375417122 has 6 divisors (see below), whose sum is σ = 324564112443. Its totient is φ = 108187379642.

The previous prime is 216375417107. The next prime is 216375417157. The reversal of 216375417122 is 221714573612.

It can be written as a sum of positive squares in only one way, i.e., 108187708561 + 108187708561 = 328919^2 + 328919^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=328919.

It is a super-2 number, since 2×216375417122² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216375417122.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 493379 + ... + 822297.

Almost surely, 2^216375417122 is an apocalyptic number.

216375417122 is a deficient number, since it is larger than the sum of its proper divisors (108188695321).

216375417122 is an frugal number, since it uses more digits than its factorization.

216375417122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657840 (or 328921 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The spelling of 216375417122 in words is "two hundred sixteen billion, three hundred seventy-five million, four hundred seventeen thousand, one hundred twenty-two".