21213202330220 has 48 divisors (see below), whose sum is σ = 45049280734080. Its totient is φ = 8389750803456.

The previous prime is 21213202330181. The next prime is 21213202330231. The reversal of 21213202330220 is 2203320231212.

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, 98990909 + ... + 99204971.

It is an arithmetic number, because the mean of its divisors is an integer number (938526681960).

Almost surely, 2^{21213202330220} is an apocalyptic number.

21213202330220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21213202330220 is an abundant number, since it is smaller than the sum of its proper divisors (23836078403860).

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

21213202330220 is a wasteful number, since it uses less digits than its factorization.

21213202330220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269834 (or 269832 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21213202330220 its reverse (2203320231212), we get a palindrome (23416522561432).

The spelling of 21213202330220 in words is "twenty-one trillion, two hundred thirteen billion, two hundred two million, three hundred thirty thousand, two hundred twenty".