21222200210 has 16 divisors (see below), whose sum is σ = 38215679256. Its totient is φ = 8485387008.

The previous prime is 21222200201. The next prime is 21222200221. The reversal of 21222200210 is 1200222212.

It can be written as a sum of positive squares in 4 ways, for example, as 20751266809 + 470933401 = 144053^2 + 21701^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 411047 + ... + 459786.

Almost surely, 2^21222200210 is an apocalyptic number.

21222200210 is a deficient number, since it is larger than the sum of its proper divisors (16993479046).

21222200210 is a wasteful number, since it uses less digits than its factorization.

21222200210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 873277.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 21222200210 its reverse (1200222212), we get a palindrome (22422422422).

The spelling of 21222200210 in words is "twenty-one billion, two hundred twenty-two million, two hundred thousand, two hundred ten".