21222102020120 has 64 divisors (see below), whose sum is σ = 50570896237920. Its totient is φ = 7987544193024.

The previous prime is 21222102020101. The next prime is 21222102020219. The reversal of 21222102020120 is 2102020122212.

It is a happy number.

It is a super-2 number, since 2×21222102020120² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1029242 + ... + 6595721.

Almost surely, 2^{21222102020120} is an apocalyptic number.

21222102020120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21222102020120 is an abundant number, since it is smaller than the sum of its proper divisors (29348794217800).

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

21222102020120 is a wasteful number, since it uses less digits than its factorization.

21222102020120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7629084 (or 7629080 counting only the distinct ones).

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

Adding to 21222102020120 its reverse (2102020122212), we get a palindrome (23324122142332).

The spelling of 21222102020120 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred two million, twenty thousand, one hundred twenty".