120210121221 has 4 divisors (see below), whose sum is σ = 160280161632. Its totient is φ = 80140080812.

The previous prime is 120210121189. The next prime is 120210121237. The reversal of 120210121221 is 122121012021.

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 120210121221 - 2⁵ = 120210121189 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120210121221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120210121121) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 20035020201 + ... + 20035020206.

It is an arithmetic number, because the mean of its divisors is an integer number (40070040408).

Almost surely, 2^120210121221 is an apocalyptic number.

It is an amenable number.

120210121221 is a deficient number, since it is larger than the sum of its proper divisors (40070040411).

120210121221 is an equidigital number, since it uses as much as digits as its factorization.

120210121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40070040410.

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

Adding to 120210121221 its reverse (122121012021), we get a palindrome (242331133242).

The spelling of 120210121221 in words is "one hundred twenty billion, two hundred ten million, one hundred twenty-one thousand, two hundred twenty-one".