21221120120000 has 70 divisors (see below), whose sum is σ = 52621481132748. Its totient is φ = 8488448032000.

The previous prime is 21221120119967. The next prime is 21221120120077. The reversal of 21221120120000 is 2102112212.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 265224002 + ... + 265304001.

Almost surely, 2^{21221120120000} is an apocalyptic number.

21221120120000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21221120120000 is an abundant number, since it is smaller than the sum of its proper divisors (31400361012748).

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

21221120120000 is an frugal number, since it uses more digits than its factorization.

21221120120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530528035 (or 530528010 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 21221120120000 its reverse (2102112212), we get a palindrome (21223222232212).

The spelling of 21221120120000 in words is "twenty-one trillion, two hundred twenty-one billion, one hundred twenty million, one hundred twenty thousand".