120021012002221 has 12 divisors (see below), whose sum is σ = 131925020141376. Its totient is φ = 109109102908520.

The previous prime is 120021012002179. The next prime is 120021012002251. The reversal of 120021012002221 is 122200210120021.

It is a happy number.

It is not a de Polignac number, because 120021012002221 - 2²⁵ = 120020978447789 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120021012002195 and 120021012002204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021012002251) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 10691706 + ... + 18824308.

It is an arithmetic number, because the mean of its divisors is an integer number (10993751678448).

Almost surely, 2^{120021012002221} is an apocalyptic number.

120021012002221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120021012002221 is a deficient number, since it is larger than the sum of its proper divisors (11904008139155).

120021012002221 is a wasteful number, since it uses less digits than its factorization.

120021012002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8254592 (or 8254581 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 120021012002221 its reverse (122200210120021), we get a palindrome (242221222122242).

The spelling of 120021012002221 in words is "one hundred twenty trillion, twenty-one billion, twelve million, two thousand, two hundred twenty-one".