21202120222 has 32 divisors (see below), whose sum is σ = 34307610624. Its totient is φ = 9798386400.

The previous prime is 21202120213. The next prime is 21202120229. The reversal of 21202120222 is 22202120212.

It is a junction number, because it is equal to n+sod(n) for n = 21202120196 and 21202120205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21202120229) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 974608 + ... + 996124.

It is an arithmetic number, because the mean of its divisors is an integer number (1072112832).

Almost surely, 2^21202120222 is an apocalyptic number.

21202120222 is a deficient number, since it is larger than the sum of its proper divisors (13105490402).

21202120222 is a wasteful number, since it uses less digits than its factorization.

21202120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22264.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21202120222 its reverse (22202120212), we get a palindrome (43404240434).

The spelling of 21202120222 in words is "twenty-one billion, two hundred two million, one hundred twenty thousand, two hundred twenty-two".