12221153280 has 504 divisors, whose sum is σ = 49727644512. Its totient is φ = 2717908992.

The previous prime is 12221153279. The next prime is 12221153327. The reversal of 12221153280 is 8235112221.

12221153280 is a `hidden beast` number, since 1 + 222 + 115 + 328 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (504).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 330301422 + ... + 330301458.

Almost surely, 2^12221153280 is an apocalyptic number.

12221153280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12221153280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24863822256).

12221153280 is an abundant number, since it is smaller than the sum of its proper divisors (37506491232).

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

12221153280 is an frugal number, since it uses more digits than its factorization.

12221153280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95 (or 54 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

It can be divided in two parts, 1222115 and 3280, that added together give a triangular number (1225395 = T₁₅₆₅).

The spelling of 12221153280 in words is "twelve billion, two hundred twenty-one million, one hundred fifty-three thousand, two hundred eighty".