21222211211210 has 64 divisors (see below), whose sum is σ = 40044180356352. Its totient is φ = 8082471108096.

The previous prime is 21222211211153. The next prime is 21222211211261. The reversal of 21222211211210 is 1211211222212.

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, 290929862 + ... + 291002798.

It is an arithmetic number, because the mean of its divisors is an integer number (625690318068).

Almost surely, 2^{21222211211210} is an apocalyptic number.

21222211211210 is a deficient number, since it is larger than the sum of its proper divisors (18821969145142).

21222211211210 is a wasteful number, since it uses less digits than its factorization.

21222211211210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78767.

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 21222211211210 its reverse (1211211222212), we get a palindrome (22433422433422).

The spelling of 21222211211210 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred eleven million, two hundred eleven thousand, two hundred ten".