21022200222 has 16 divisors (see below), whose sum is σ = 42135608592. Its totient is φ = 6992198720.

The previous prime is 21022200131. The next prime is 21022200223. The reversal of 21022200222 is 22200222012.

21022200222 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022200223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3797343 + ... + 3802874.

It is an arithmetic number, because the mean of its divisors is an integer number (2633475537).

Almost surely, 2^21022200222 is an apocalyptic number.

21022200222 is an abundant number, since it is smaller than the sum of its proper divisors (21113408370).

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

21022200222 is a wasteful number, since it uses less digits than its factorization.

21022200222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7600683.

The product of its (nonzero) digits is 128, while the sum is 15.

Adding to 21022200222 its reverse (22200222012), we get a palindrome (43222422234).

The spelling of 21022200222 in words is "twenty-one billion, twenty-two million, two hundred thousand, two hundred twenty-two".