12105521124 has 24 divisors (see below), whose sum is σ = 28364407680. Its totient is φ = 4018289184.

The previous prime is 12105521117. The next prime is 12105521137. The reversal of 12105521124 is 42112550121.

It is a happy number.

It is a super-2 number, since 2×12105521124² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12105521094 and 12105521103.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2107579 + ... + 2113314.

It is an arithmetic number, because the mean of its divisors is an integer number (1181850320).

Almost surely, 2^12105521124 is an apocalyptic number.

It is an amenable number.

12105521124 is an abundant number, since it is smaller than the sum of its proper divisors (16258886556).

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

12105521124 is a wasteful number, since it uses less digits than its factorization.

12105521124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4221139 (or 4221137 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

The spelling of 12105521124 in words is "twelve billion, one hundred five million, five hundred twenty-one thousand, one hundred twenty-four".