21222926899200 has 1440 divisors, whose sum is σ = 85622249512800. Its totient is φ = 5164239421440.

The previous prime is 21222926899183. The next prime is 21222926899253. The reversal of 21222926899200 is 299862922212.

It is a happy number.

21222926899200 is a `hidden beast` number, since 2 + 1 + 2 + 2 + 292 + 68 + 99 + 200 = 666.

It is a tau number, because it is divible by the number of its divisors (1440).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 4798308189 + ... + 4798312611.

It is an arithmetic number, because the mean of its divisors is an integer number (59459895495).

Almost surely, 2^{21222926899200} is an apocalyptic number.

21222926899200 is a gapful number since it is divisible by the number (20) 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 21222926899200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42811124756400).

21222926899200 is an abundant number, since it is smaller than the sum of its proper divisors (64399322613600).

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

21222926899200 is a wasteful number, since it uses less digits than its factorization.

21222926899200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4569 (or 4535 counting only the distinct ones).

The product of its (nonzero) digits is 2239488, while the sum is 54.

The spelling of 21222926899200 in words is "twenty-one trillion, two hundred twenty-two billion, nine hundred twenty-six million, eight hundred ninety-nine thousand, two hundred".