12161215712 has 24 divisors (see below), whose sum is σ = 24334895592. Its totient is φ = 5980924800.

The previous prime is 12161215709. The next prime is 12161215721. The reversal of 12161215712 is 21751216121.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3113114 + ... + 3117017.

It is an arithmetic number, because the mean of its divisors is an integer number (1013953983).

Almost surely, 2^12161215712 is an apocalyptic number.

It is an amenable number.

12161215712 is an abundant number, since it is smaller than the sum of its proper divisors (12173679880).

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

12161215712 is an equidigital number, since it uses as much as digits as its factorization.

12161215712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6230202 (or 6230194 counting only the distinct ones).

The product of its digits is 1680, while the sum is 29.

The spelling of 12161215712 in words is "twelve billion, one hundred sixty-one million, two hundred fifteen thousand, seven hundred twelve".