12421994116 has 81 divisors (see below), whose sum is σ = 26752455639. Its totient is φ = 5031479376.

The previous prime is 12421994071. The next prime is 12421994131. The reversal of 12421994116 is 61149912421.

The square root of 12421994116 is 111454.

It is a perfect power (a square), and thus also a powerful number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 29646555 + ... + 29646973.

Almost surely, 2^12421994116 is an apocalyptic number.

12421994116 is the 111454-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12421994116

12421994116 is an abundant number, since it is smaller than the sum of its proper divisors (14330461523).

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

12421994116 is an equidigital number, since it uses as much as digits as its factorization.

12421994116 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894 (or 447 counting only the distinct ones).

The product of its digits is 31104, while the sum is 40.

The spelling of 12421994116 in words is "twelve billion, four hundred twenty-one million, nine hundred ninety-four thousand, one hundred sixteen".