120002120221 has 6 divisors (see below), whose sum is σ = 123000390266. Its totient is φ = 117075237600.

The previous prime is 120002120177. The next prime is 120002120257. The reversal of 120002120221 is 122021200021.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 16088121 + 119986032100 = 4011^2 + 346390^2 .

It is not a de Polignac number, because 120002120221 - 2⁷ = 120002120093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120002120621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35691990 + ... + 35695351.

Almost surely, 2^120002120221 is an apocalyptic number.

It is an amenable number.

120002120221 is a deficient number, since it is larger than the sum of its proper divisors (2998270045).

120002120221 is an frugal number, since it uses more digits than its factorization.

120002120221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71387423 (or 71387382 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 120002120221 its reverse (122021200021), we get a palindrome (242023320242).

The spelling of 120002120221 in words is "one hundred twenty billion, two million, one hundred twenty thousand, two hundred twenty-one".