21222200112 has 40 divisors (see below), whose sum is σ = 56305751856. Its totient is φ = 6882875136.

The previous prime is 21222200101. The next prime is 21222200123. The reversal of 21222200112 is 21100222212.

It is an interprime number because it is at equal distance from previous prime (21222200101) and next prime (21222200123).

It is a junction number, because it is equal to n+sod(n) for n = 21222200091 and 21222200100.

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, 5972943 + ... + 5976494.

Almost surely, 2^21222200112 is an apocalyptic number.

It is an amenable number.

21222200112 is an abundant number, since it is smaller than the sum of its proper divisors (35083551744).

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

21222200112 is a wasteful number, since it uses less digits than its factorization.

21222200112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11949485 (or 11949479 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 21222200112 its reverse (21100222212), we get a palindrome (42322422324).

The spelling of 21222200112 in words is "twenty-one billion, two hundred twenty-two million, two hundred thousand, one hundred twelve".