12099999955 has 32 divisors (see below), whose sum is σ = 15045912000. Its totient is φ = 9336422400.

The previous prime is 12099999937. The next prime is 12099999979. The reversal of 12099999955 is 55999999021.

It is not a de Polignac number, because 12099999955 - 2¹⁷ = 12099868883 is a prime.

It is a super-2 number, since 2×12099999955² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11534271 + ... + 11535319.

It is an arithmetic number, because the mean of its divisors is an integer number (470184750).

Almost surely, 2^12099999955 is an apocalyptic number.

12099999955 is a deficient number, since it is larger than the sum of its proper divisors (2945912045).

12099999955 is a wasteful number, since it uses less digits than its factorization.

12099999955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815.

The product of its (nonzero) digits is 26572050, while the sum is 67.

The spelling of 12099999955 in words is "twelve billion, ninety-nine million, nine hundred ninety-nine thousand, nine hundred fifty-five".