120121221021 has 8 divisors (see below), whose sum is σ = 160645501344. Its totient is φ = 79838877360.

The previous prime is 120121220971. The next prime is 120121221037. The reversal of 120121221021 is 120122121021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120121221021 - 2¹⁹ = 120120696733 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121221071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60483006 + ... + 60484991.

It is an arithmetic number, because the mean of its divisors is an integer number (20080687668).

Almost surely, 2^120121221021 is an apocalyptic number.

It is an amenable number.

120121221021 is a deficient number, since it is larger than the sum of its proper divisors (40524280323).

120121221021 is a wasteful number, since it uses less digits than its factorization.

120121221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120968331.

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

Adding to 120121221021 its reverse (120122121021), we get a palindrome (240243342042).

The spelling of 120121221021 in words is "one hundred twenty billion, one hundred twenty-one million, two hundred twenty-one thousand, twenty-one".