218237139122 has 6 divisors (see below), whose sum is σ = 327356699679. Its totient is φ = 109118239230.

The previous prime is 218237139119. The next prime is 218237139151. The reversal of 218237139122 is 221931732812.

It can be written as a sum of positive squares in only one way, i.e., 109118569561 + 109118569561 = 330331^2 + 330331^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=330331.

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 218237139122.

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, 495497 + ... + 825827.

Almost surely, 2^218237139122 is an apocalyptic number.

218237139122 is a deficient number, since it is larger than the sum of its proper divisors (109119560557).

218237139122 is an frugal number, since it uses more digits than its factorization.

218237139122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660664 (or 330333 counting only the distinct ones).

The product of its digits is 72576, while the sum is 41.

The spelling of 218237139122 in words is "two hundred eighteen billion, two hundred thirty-seven million, one hundred thirty-nine thousand, one hundred twenty-two".