21003120221120 has 56 divisors (see below), whose sum is σ = 50646764644800. Its totient is φ = 8294903165952.

The previous prime is 21003120221089. The next prime is 21003120221191. The reversal of 21003120221120 is 2112202130012.

It is a super-2 number, since 2×21003120221120² (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, 415384535 + ... + 415435094.

Almost surely, 2^{21003120221120} is an apocalyptic number.

21003120221120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21003120221120 is an abundant number, since it is smaller than the sum of its proper divisors (29643644423680).

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

21003120221120 is an equidigital number, since it uses as much as digits as its factorization.

21003120221120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830819725 (or 830819715 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 21003120221120 its reverse (2112202130012), we get a palindrome (23115322351132).

The spelling of 21003120221120 in words is "twenty-one trillion, three billion, one hundred twenty million, two hundred twenty-one thousand, one hundred twenty".