12123124640 has 48 divisors (see below), whose sum is σ = 31244603040. Its totient is φ = 4408408320.

The previous prime is 12123124621. The next prime is 12123124679. The reversal of 12123124640 is 4642132121.

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, 3442310 + ... + 3445829.

It is an arithmetic number, because the mean of its divisors is an integer number (650929230).

Almost surely, 2^12123124640 is an apocalyptic number.

12123124640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12123124640 is an abundant number, since it is smaller than the sum of its proper divisors (19121478400).

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

12123124640 is a wasteful number, since it uses less digits than its factorization.

12123124640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6888165 (or 6888157 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

Adding to 12123124640 its reverse (4642132121), we get a palindrome (16765256761).

The spelling of 12123124640 in words is "twelve billion, one hundred twenty-three million, one hundred twenty-four thousand, six hundred forty".