120220101 has 6 divisors (see below), whose sum is σ = 173651270. Its totient is φ = 80146728.

The previous prime is 120220099. The next prime is 120220117. The reversal of 120220101 is 101022021.

It can be written as a sum of positive squares in only one way, i.e., 63202500 + 57017601 = 7950^2 + 7551^2 .

It is not a de Polignac number, because 120220101 - 2¹ = 120220099 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9), and also a Moran number because the ratio is a prime number: 13357789 = 120220101 / (1 + 2 + 0 + 2 + 2 + 0 + 1 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120220181) 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, 6678886 + ... + 6678903.

Almost surely, 2^120220101 is an apocalyptic number.

It is an amenable number.

120220101 is a deficient number, since it is larger than the sum of its proper divisors (53431169).

120220101 is a wasteful number, since it uses less digits than its factorization.

120220101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13357795 (or 13357792 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 9.

The square root of 120220101 is about 10964.4927379245. The cubic root of 120220101 is about 493.5437949819.

Adding to 120220101 its reverse (101022021), we get a palindrome (221242122).

The spelling of 120220101 in words is "one hundred twenty million, two hundred twenty thousand, one hundred one".