21222201112 has 32 divisors (see below), whose sum is σ = 45482976000. Its totient is φ = 9093862944.

The previous prime is 21222201047. The next prime is 21222201149. The reversal of 21222201112 is 21110222212.

It is a happy number.

It is a congruent number.

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, 406533 + ... + 455755.

It is an arithmetic number, because the mean of its divisors is an integer number (1421343000).

Almost surely, 2^21222201112 is an apocalyptic number.

It is an amenable number.

21222201112 is an abundant number, since it is smaller than the sum of its proper divisors (24260774888).

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

21222201112 is a wasteful number, since it uses less digits than its factorization.

21222201112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56935 (or 56931 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21222201112 its reverse (21110222212), we get a palindrome (42332423324).

The spelling of 21222201112 in words is "twenty-one billion, two hundred twenty-two million, two hundred one thousand, one hundred twelve".