21222010100222 has 32 divisors (see below), whose sum is σ = 33410777624640. Its totient is φ = 10090471311360.

The previous prime is 21222010100173. The next prime is 21222010100233. The reversal of 21222010100222 is 22200101022212.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 21222010100222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187601054 + ... + 187714142.

It is an arithmetic number, because the mean of its divisors is an integer number (1044086800770).

Almost surely, 2^{21222010100222} is an apocalyptic number.

21222010100222 is a deficient number, since it is larger than the sum of its proper divisors (12188767524418).

21222010100222 is a wasteful number, since it uses less digits than its factorization.

21222010100222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136868.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21222010100222 its reverse (22200101022212), we get a palindrome (43422111122434).

The spelling of 21222010100222 in words is "twenty-one trillion, two hundred twenty-two billion, ten million, one hundred thousand, two hundred twenty-two".