21302003031220 has 48 divisors (see below), whose sum is σ = 44756867312640. Its totient is φ = 8516485703936.

The previous prime is 21302003031203. The next prime is 21302003031247. The reversal of 21302003031220 is 2213030020312.

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, 513045621 + ... + 513087139.

It is an arithmetic number, because the mean of its divisors is an integer number (932434735680).

Almost surely, 2^{21302003031220} is an apocalyptic number.

21302003031220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21302003031220 is an abundant number, since it is smaller than the sum of its proper divisors (23454864281420).

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

21302003031220 is a wasteful number, since it uses less digits than its factorization.

21302003031220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53904 (or 53902 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21302003031220 its reverse (2213030020312), we get a palindrome (23515033051532).

The spelling of 21302003031220 in words is "twenty-one trillion, three hundred two billion, three million, thirty-one thousand, two hundred twenty".