12921380927850 has 144 divisors (see below), whose sum is σ = 34598963354976. Its totient is φ = 3189848448000.

The previous prime is 12921380927813. The next prime is 12921380927869. The reversal of 12921380927850 is 5872908312921.

It is a hoax number, since the sum of its digits (57) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 201145 + ... + 5087555.

It is an arithmetic number, because the mean of its divisors is an integer number (240270578854).

Almost surely, 2^{12921380927850} is an apocalyptic number.

12921380927850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 12921380927850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17299481677488).

12921380927850 is an abundant number, since it is smaller than the sum of its proper divisors (21677582427126).

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

12921380927850 is a wasteful number, since it uses less digits than its factorization.

12921380927850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4886521 (or 4886499 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 57.

The spelling of 12921380927850 in words is "twelve trillion, nine hundred twenty-one billion, three hundred eighty million, nine hundred twenty-seven thousand, eight hundred fifty".