120021020121021 has 4 divisors (see below), whose sum is σ = 160028026828032. Its totient is φ = 80014013414012.

The previous prime is 120021020121007. The next prime is 120021020121073. The reversal of 120021020121021 is 120121020120021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 120021020121021 - 2⁷ = 120021020120893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120021020128021) 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 3 ways as a sum of consecutive naturals, for example, 20003503353501 + ... + 20003503353506.

It is an arithmetic number, because the mean of its divisors is an integer number (40007006707008).

Almost surely, 2^{120021020121021} is an apocalyptic number.

It is an amenable number.

120021020121021 is a deficient number, since it is larger than the sum of its proper divisors (40007006707011).

120021020121021 is an equidigital number, since it uses as much as digits as its factorization.

120021020121021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40007006707010.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 120021020121021 its reverse (120121020120021), we get a palindrome (240142040241042).

The spelling of 120021020121021 in words is "one hundred twenty trillion, twenty-one billion, twenty million, one hundred twenty-one thousand, twenty-one".