21022012220120 has 32 divisors (see below), whose sum is σ = 47301022494000. Its totient is φ = 8408539110528.

The previous prime is 21022012220113. The next prime is 21022012220137. The reversal of 21022012220120 is 2102221022012.

It is a happy number.

It is a super-2 number, since 2×21022012220120² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7021739 + ... + 9557658.

Almost surely, 2^{21022012220120} is an apocalyptic number.

21022012220120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21022012220120 is an abundant number, since it is smaller than the sum of its proper divisors (26279010273880).

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

21022012220120 is a wasteful number, since it uses less digits than its factorization.

21022012220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16611107 (or 16611103 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21022012220120 its reverse (2102221022012), we get a palindrome (23124233242132).

The spelling of 21022012220120 in words is "twenty-one trillion, twenty-two billion, twelve million, two hundred twenty thousand, one hundred twenty".