21200100000222 has 64 divisors (see below), whose sum is σ = 49960635588864. Its totient is φ = 5912501091840.

The previous prime is 21200100000151. The next prime is 21200100000269. The reversal of 21200100000222 is 22200000100212.

It is a junction number, because it is equal to n+sod(n) for n = 21200100000198 and 21200100000207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36370708 + ... + 36948999.

It is an arithmetic number, because the mean of its divisors is an integer number (780634931076).

Almost surely, 2^{21200100000222} is an apocalyptic number.

21200100000222 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

21200100000222 is an abundant number, since it is smaller than the sum of its proper divisors (28760535588642).

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

21200100000222 is a wasteful number, since it uses less digits than its factorization.

21200100000222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73320073.

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 21200100000222 its reverse (22200000100212), we get a palindrome (43400100100434).

The spelling of 21200100000222 in words is "twenty-one trillion, two hundred billion, one hundred million, two hundred twenty-two", and thus it is an aban number.