21220300112 has 40 divisors (see below), whose sum is σ = 46802093760. Its totient is φ = 9226215680.

The previous prime is 21220300103. The next prime is 21220300117. The reversal of 21220300112 is 21100302212.

It is a happy number.

It is a super-2 number, since 2×21220300112² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220300117) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2617037 + ... + 2625132.

It is an arithmetic number, because the mean of its divisors is an integer number (1170052344).

Almost surely, 2^21220300112 is an apocalyptic number.

21220300112 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

21220300112 is an abundant number, since it is smaller than the sum of its proper divisors (25581793648).

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

21220300112 is a wasteful number, since it uses less digits than its factorization.

21220300112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5242211 (or 5242205 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21220300112 its reverse (21100302212), we get a palindrome (42320602324).

The spelling of 21220300112 in words is "twenty-one billion, two hundred twenty million, three hundred thousand, one hundred twelve".