21023130212220 has 48 divisors (see below), whose sum is σ = 58865963698080. Its totient is φ = 5606053856256.

The previous prime is 21023130212209. The next prime is 21023130212237. The reversal of 21023130212220 is 2221203132012.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 578065 + ... + 6510024.

It is an arithmetic number, because the mean of its divisors is an integer number (1226374243710).

Almost surely, 2^{21023130212220} is an apocalyptic number.

21023130212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21023130212220 is an abundant number, since it is smaller than the sum of its proper divisors (37842833485860).

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

21023130212220 is a wasteful number, since it uses less digits than its factorization.

21023130212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7137534 (or 7137532 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 21023130212220 its reverse (2221203132012), we get a palindrome (23244333344232).

The spelling of 21023130212220 in words is "twenty-one trillion, twenty-three billion, one hundred thirty million, two hundred twelve thousand, two hundred twenty".