12698123522 has 18 divisors (see below), whose sum is σ = 22158876483. Its totient is φ = 5441574852.

The previous prime is 12698123507. The next prime is 12698123549. The reversal of 12698123522 is 22532189621.

It can be written as a sum of positive squares in only one way, i.e., 6349061761 + 6349061761 = 79681^2 + 79681^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=79681.

It is a super-2 number, since 2×12698123522² (a number of 21 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 12698123522.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1109843 + ... + 1121225.

Almost surely, 2^12698123522 is an apocalyptic number.

12698123522 is a deficient number, since it is larger than the sum of its proper divisors (9460752961).

12698123522 is an frugal number, since it uses more digits than its factorization.

12698123522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22782 (or 11392 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The spelling of 12698123522 in words is "twelve billion, six hundred ninety-eight million, one hundred twenty-three thousand, five hundred twenty-two".