12821216742 has 24 divisors (see below), whose sum is σ = 27796630680. Its totient is φ = 4271073120.

The previous prime is 12821216731. The next prime is 12821216797. The reversal of 12821216742 is 24761212821.

It is a junction number, because it is equal to n+sod(n) for n = 12821216697 and 12821216706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 192384 + ... + 250307.

It is an arithmetic number, because the mean of its divisors is an integer number (1158192945).

Almost surely, 2^12821216742 is an apocalyptic number.

12821216742 is an abundant number, since it is smaller than the sum of its proper divisors (14975413938).

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

12821216742 is a wasteful number, since it uses less digits than its factorization.

12821216742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444308 (or 444305 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The spelling of 12821216742 in words is "twelve billion, eight hundred twenty-one million, two hundred sixteen thousand, seven hundred forty-two".