21330223031128 has 48 divisors (see below), whose sum is σ = 44054666805240. Its totient is φ = 9674794356480.

The previous prime is 21330223031101. The next prime is 21330223031129. The reversal of 21330223031128 is 82113032203312.

It is a self number, because there is not a number n which added to its sum of digits gives 21330223031128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21330223031129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23140401 + ... + 24044512.

Almost surely, 2^{21330223031128} is an apocalyptic number.

It is an amenable number.

21330223031128 is an abundant number, since it is smaller than the sum of its proper divisors (22724443774112).

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

21330223031128 is a wasteful number, since it uses less digits than its factorization.

21330223031128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47185408 (or 47185393 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 21330223031128 in words is "twenty-one trillion, three hundred thirty billion, two hundred twenty-three million, thirty-one thousand, one hundred twenty-eight".