21213002200220 has 24 divisors (see below), whose sum is σ = 44796172251600. Its totient is φ = 8437797521792.

The previous prime is 21213002200213. The next prime is 21213002200231. The reversal of 21213002200220 is 2200220031212.

It is a super-3 number, since 3×21213002200220³ (a number of 41 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2962706225 + ... + 2962713384.

It is an arithmetic number, because the mean of its divisors is an integer number (1866507177150).

Almost surely, 2^{21213002200220} is an apocalyptic number.

21213002200220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21213002200220 is an abundant number, since it is smaller than the sum of its proper divisors (23583170051380).

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

21213002200220 is a wasteful number, since it uses less digits than its factorization.

21213002200220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5925419797 (or 5925419795 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21213002200220 its reverse (2200220031212), we get a palindrome (23413222231432).

The spelling of 21213002200220 in words is "twenty-one trillion, two hundred thirteen billion, two million, two hundred thousand, two hundred twenty".