12621512000 has 56 divisors (see below), whose sum is σ = 31257194280. Its totient is φ = 5048601600.

The previous prime is 12621511999. The next prime is 12621512003. The reversal of 12621512000 is 21512621.

It can be written as a sum of positive squares in 4 ways, for example, as 2321697856 + 10299814144 = 48184^2 + 101488^2 .

It is a super-2 number, since 2×12621512000² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12621512003) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 780845 + ... + 796844.

Almost surely, 2^12621512000 is an apocalyptic number.

12621512000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12621512000 is an abundant number, since it is smaller than the sum of its proper divisors (18635682280).

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

12621512000 is an equidigital number, since it uses as much as digits as its factorization.

12621512000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577716 (or 1577696 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

The spelling of 12621512000 in words is "twelve billion, six hundred twenty-one million, five hundred twelve thousand".