12921733398 has 32 divisors (see below), whose sum is σ = 29547348480. Its totient is φ = 3690429120.

The previous prime is 12921733373. The next prime is 12921733403. The reversal of 12921733398 is 89333712921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44863 + ... + 166901.

It is an arithmetic number, because the mean of its divisors is an integer number (923354640).

Almost surely, 2^12921733398 is an apocalyptic number.

12921733398 is an abundant number, since it is smaller than the sum of its proper divisors (16625615082).

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

12921733398 is a wasteful number, since it uses less digits than its factorization.

12921733398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124572.

The product of its digits is 489888, while the sum is 48.

The spelling of 12921733398 in words is "twelve billion, nine hundred twenty-one million, seven hundred thirty-three thousand, three hundred ninety-eight".