21000000202220 has 24 divisors (see below), whose sum is σ = 47492308150224. Its totient is φ = 7753846228416.

The previous prime is 21000000202189. The next prime is 21000000202243. The reversal of 21000000202220 is 2220200000012.

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, 40384615514 + ... + 40384616033.

It is an arithmetic number, because the mean of its divisors is an integer number (1978846172926).

Almost surely, 2^{21000000202220} is an apocalyptic number.

21000000202220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21000000202220 is an abundant number, since it is smaller than the sum of its proper divisors (26492307948004).

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

21000000202220 is a wasteful number, since it uses less digits than its factorization.

21000000202220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80769231569 (or 80769231567 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 11.

Adding to 21000000202220 its reverse (2220200000012), we get a palindrome (23220200202232).

The spelling of 21000000202220 in words is "twenty-one trillion, two hundred two thousand, two hundred twenty".