21023133120 has 224 divisors, whose sum is σ = 80907575040. Its totient is φ = 5096494080.

The previous prime is 21023133083. The next prime is 21023133161. The reversal of 21023133120 is 2133132012.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 21023133093 and 21023133102.

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, 15562 + ... + 205641.

Almost surely, 2^21023133120 is an apocalyptic number.

21023133120 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 21023133120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40453787520).

21023133120 is an abundant number, since it is smaller than the sum of its proper divisors (59884441920).

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

21023133120 is a wasteful number, since it uses less digits than its factorization.

21023133120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221240 (or 221224 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 21023133120 its reverse (2133132012), we get a palindrome (23156265132).

The spelling of 21023133120 in words is "twenty-one billion, twenty-three million, one hundred thirty-three thousand, one hundred twenty".