21230222212120 has 32 divisors (see below), whose sum is σ = 47768475316320. Its totient is φ = 8492004380160.

The previous prime is 21230222212097. The next prime is 21230222212153. The reversal of 21230222212120 is 2121222203212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21230222212091 and 21230222212100.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1509709 + ... + 6688771.

It is an arithmetic number, because the mean of its divisors is an integer number (1492764853635).

Almost surely, 2^{21230222212120} is an apocalyptic number.

21230222212120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21230222212120 is an abundant number, since it is smaller than the sum of its proper divisors (26538253104200).

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

21230222212120 is a wasteful number, since it uses less digits than its factorization.

21230222212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5281555 (or 5281551 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21230222212120 its reverse (2121222203212), we get a palindrome (23351444415332).

The spelling of 21230222212120 in words is "twenty-one trillion, two hundred thirty billion, two hundred twenty-two million, two hundred twelve thousand, one hundred twenty".