21222300112 has 20 divisors (see below), whose sum is σ = 44281145860. Its totient is φ = 9794907648.

The previous prime is 21222300091. The next prime is 21222300133. The reversal of 21222300112 is 21100322212.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (21222300091) and next prime (21222300133).

It can be written as a sum of positive squares in 2 ways, for example, as 12056918416 + 9165381696 = 109804^2 + 95736^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51014937 + ... + 51015352.

It is an arithmetic number, because the mean of its divisors is an integer number (2214057293).

Almost surely, 2^21222300112 is an apocalyptic number.

It is an amenable number.

21222300112 is an abundant number, since it is smaller than the sum of its proper divisors (23058845748).

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

21222300112 is a wasteful number, since it uses less digits than its factorization.

21222300112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102030310 (or 102030304 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21222300112 its reverse (21100322212), we get a palindrome (42322622324).

The spelling of 21222300112 in words is "twenty-one billion, two hundred twenty-two million, three hundred thousand, one hundred twelve".