12200157218 has 18 divisors (see below), whose sum is σ = 18543082737. Its totient is φ = 6020179240.

The previous prime is 12200157181. The next prime is 12200157247. The reversal of 12200157218 is 81275100221.

It can be written as a sum of positive squares in 2 ways, for example, as 12021587449 + 178569769 = 109643^2 + 13363^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=78103.

It is a super-2 number, since 2×12200157218² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

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, 12964628 + ... + 12965568.

Almost surely, 2^12200157218 is an apocalyptic number.

12200157218 is a deficient number, since it is larger than the sum of its proper divisors (6342925519).

12200157218 is an frugal number, since it uses more digits than its factorization.

12200157218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2050 (or 1026 counting only the distinct ones).

The product of its (nonzero) digits is 2240, while the sum is 29.

Adding to 12200157218 its reverse (81275100221), we get a palindrome (93475257439).

The spelling of 12200157218 in words is "twelve billion, two hundred million, one hundred fifty-seven thousand, two hundred eighteen".