21220300120 has 32 divisors (see below), whose sum is σ = 47750242320. Its totient is φ = 8487308160.

The previous prime is 21220300117. The next prime is 21220300121. The reversal of 21220300120 is 2100302212.

It is a super-2 number, since 2×21220300120² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21220300120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220300121) 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, 571234 + ... + 607246.

Almost surely, 2^21220300120 is an apocalyptic number.

21220300120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21220300120 is an abundant number, since it is smaller than the sum of its proper divisors (26529942200).

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

21220300120 is a wasteful number, since it uses less digits than its factorization.

21220300120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50755 (or 50751 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 13.

Adding to 21220300120 its reverse (2100302212), we get a palindrome (23320602332).

The spelling of 21220300120 in words is "twenty-one billion, two hundred twenty million, three hundred thousand, one hundred twenty".