12099426566929 has 27 divisors (see below), whose sum is σ = 13388789353233. Its totient is φ = 10929149411232.

The previous prime is 12099426566921. The next prime is 12099426566933. The reversal of 12099426566929 is 92966562499021.

The square root of 12099426566929 is 3478423.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 6443591326929 + 5655835240000 = 2538423^2 + 2378200^2 .

It is not a de Polignac number, because 12099426566929 - 2³ = 12099426566921 is a prime.

It is a super-2 number, since 2×12099426566929² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12099426566921) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 2125313607 + ... + 2125319299.

Almost surely, 2^{12099426566929} is an apocalyptic number.

12099426566929 is the 3478423-rd square number.

12099426566929 is the 1739212-nd centered octagonal number.

It is an amenable number.

12099426566929 is a deficient number, since it is larger than the sum of its proper divisors (1289362786304).

12099426566929 is an frugal number, since it uses more digits than its factorization.

12099426566929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11506 (or 5753 counting only the distinct ones).

The product of its (nonzero) digits is 226748160, while the sum is 70.

The spelling of 12099426566929 in words is "twelve trillion, ninety-nine billion, four hundred twenty-six million, five hundred sixty-six thousand, nine hundred twenty-nine".