21283327228128 has 192 divisors, whose sum is σ = 67959827324928. Its totient is φ = 5693282426880.

The previous prime is 21283327228063. The next prime is 21283327228151. The reversal of 21283327228128 is 82182272338212.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2695075 + ... + 7059042.

It is an arithmetic number, because the mean of its divisors is an integer number (353957433984).

Almost surely, 2^{21283327228128} is an apocalyptic number.

21283327228128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

21283327228128 is an abundant number, since it is smaller than the sum of its proper divisors (46676500096800).

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

21283327228128 is a wasteful number, since it uses less digits than its factorization.

21283327228128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9754345 (or 9754337 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 51.

The spelling of 21283327228128 in words is "twenty-one trillion, two hundred eighty-three billion, three hundred twenty-seven million, two hundred twenty-eight thousand, one hundred twenty-eight".