21200000222 has 4 divisors (see below), whose sum is σ = 31800000336. Its totient is φ = 10600000110.

The previous prime is 21200000219. The next prime is 21200000249. The reversal of 21200000222 is 22200000212.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5300000054 + ... + 5300000057.

It is an arithmetic number, because the mean of its divisors is an integer number (7950000084).

Almost surely, 2^21200000222 is an apocalyptic number.

21200000222 is a deficient number, since it is larger than the sum of its proper divisors (10600000114).

21200000222 is a wasteful number, since it uses less digits than its factorization.

21200000222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10600000113.

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

Adding to 21200000222 its reverse (22200000212), we get a palindrome (43400000434).

The spelling of 21200000222 in words is "twenty-one billion, two hundred million, two hundred twenty-two", and thus it is an aban number.