12011111123100 has 36 divisors (see below), whose sum is σ = 34752148183704. Its totient is φ = 3202962966080.

The previous prime is 12011111123093. The next prime is 12011111123107. The reversal of 12011111123100 is 132111111021.

It is an interprime number because it is at equal distance from previous prime (12011111123093) and next prime (12011111123107).

It is a super-2 number, since 2×12011111123100² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 12011111123100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12011111123107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20018518239 + ... + 20018518838.

Almost surely, 2^{12011111123100} is an apocalyptic number.

12011111123100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12011111123100 is an abundant number, since it is smaller than the sum of its proper divisors (22741037060604).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12011111123100 is a wasteful number, since it uses less digits than its factorization.

12011111123100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40037037094 (or 40037037087 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 15.

Adding to 12011111123100 its reverse (132111111021), we get a palindrome (12143222234121).

The spelling of 12011111123100 in words is "twelve trillion, eleven billion, one hundred eleven million, one hundred twenty-three thousand, one hundred".