12365555122 has 4 divisors (see below), whose sum is σ = 18548332686. Its totient is φ = 6182777560.

The previous prime is 12365555117. The next prime is 12365555123. The reversal of 12365555122 is 22155556321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22155556321 = 9437 ⋅2347733.

It can be written as a sum of positive squares in only one way, i.e., 9329434921 + 3036120201 = 96589^2 + 55101^2 .

It is not an unprimeable number, because it can be changed into a prime (12365555123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3091388779 + ... + 3091388782.

Almost surely, 2^12365555122 is an apocalyptic number.

12365555122 is a deficient number, since it is larger than the sum of its proper divisors (6182777564).

12365555122 is an equidigital number, since it uses as much as digits as its factorization.

12365555122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6182777563.

The product of its digits is 90000, while the sum is 37.

The spelling of 12365555122 in words is "twelve billion, three hundred sixty-five million, five hundred fifty-five thousand, one hundred twenty-two".