21202222120120 has 32 divisors (see below), whose sum is σ = 47915153974800. Its totient is φ = 8443528100608.

The previous prime is 21202222120091. The next prime is 21202222120141. The reversal of 21202222120120 is 2102122220212.

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, 1167514165 + ... + 1167532324.

Almost surely, 2^{21202222120120} is an apocalyptic number.

21202222120120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21202222120120 is an abundant number, since it is smaller than the sum of its proper divisors (26712931854680).

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

21202222120120 is a wasteful number, since it uses less digits than its factorization.

21202222120120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2335046727 (or 2335046723 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 19.

Adding to 21202222120120 its reverse (2102122220212), we get a palindrome (23304344340332).

The spelling of 21202222120120 in words is "twenty-one trillion, two hundred two billion, two hundred twenty-two million, one hundred twenty thousand, one hundred twenty".