21222112110222 has 32 divisors (see below), whose sum is σ = 43908081494400. Its totient is φ = 6830064083808.

The previous prime is 21222112110203. The next prime is 21222112110239. The reversal of 21222112110222 is 22201121122212.

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, 44499429 + ... + 44973807.

It is an arithmetic number, because the mean of its divisors is an integer number (1372127546700).

Almost surely, 2^{21222112110222} is an apocalyptic number.

21222112110222 is an abundant number, since it is smaller than the sum of its proper divisors (22685969384178).

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

21222112110222 is a wasteful number, since it uses less digits than its factorization.

21222112110222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731520.

The product of its (nonzero) digits is 256, while the sum is 21.

Adding to 21222112110222 its reverse (22201121122212), we get a palindrome (43423233232434).

The spelling of 21222112110222 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred twelve million, one hundred ten thousand, two hundred twenty-two".