12123050640 has 40 divisors (see below), whose sum is σ = 37581457728. Its totient is φ = 3232813440.

The previous prime is 12123050603. The next prime is 12123050689. The reversal of 12123050640 is 4605032121.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 12123050640.

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, 25256116 + ... + 25256595.

Almost surely, 2^12123050640 is an apocalyptic number.

12123050640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12123050640 is an abundant number, since it is smaller than the sum of its proper divisors (25458407088).

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

12123050640 is a wasteful number, since it uses less digits than its factorization.

12123050640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50512727 (or 50512721 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

Adding to 12123050640 its reverse (4605032121), we get a palindrome (16728082761).

The spelling of 12123050640 in words is "twelve billion, one hundred twenty-three million, fifty thousand, six hundred forty".