21222000222210 has 64 divisors (see below), whose sum is σ = 56603762213760. Its totient is φ = 5658023897280.

The previous prime is 21222000222193. The next prime is 21222000222253. The reversal of 21222000222210 is 1222200022212.

21222000222210 is a `hidden beast` number, since 2 + 12 + 220 + 0 + 0 + 222 + 210 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 6865876 + ... + 9464895.

It is an arithmetic number, because the mean of its divisors is an integer number (884433784590).

Almost surely, 2^{21222000222210} is an apocalyptic number.

21222000222210 is an abundant number, since it is smaller than the sum of its proper divisors (35381761991550).

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

21222000222210 is a wasteful number, since it uses less digits than its factorization.

21222000222210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16335600 (or 16335594 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 21222000222210 its reverse (1222200022212), we get a palindrome (22444200244422).

It can be divided in two parts, 212220002 and 22210, that added together give a palindrome (212242212).

The spelling of 21222000222210 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty-two thousand, two hundred ten".