21222220120112 has 20 divisors (see below), whose sum is σ = 44856056163336. Its totient is φ = 9646463690880.

The previous prime is 21222220120037. The next prime is 21222220120159. The reversal of 21222220120112 is 21102102222212.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60290397893 + ... + 60290398244.

Almost surely, 2^{21222220120112} is an apocalyptic number.

21222220120112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21222220120112 is an abundant number, since it is smaller than the sum of its proper divisors (23633836043224).

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

21222220120112 is a wasteful number, since it uses less digits than its factorization.

21222220120112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120580796156 (or 120580796150 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 21222220120112 its reverse (21102102222212), we get a palindrome (42324322342324).

The spelling of 21222220120112 in words is "twenty-one trillion, two hundred twenty-two billion, two hundred twenty million, one hundred twenty thousand, one hundred twelve".