120121101 has 6 divisors (see below), whose sum is σ = 173508270. Its totient is φ = 80080728.

The previous prime is 120121093. The next prime is 120121121. The reversal of 120121101 is 101121021.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 112911876 + 7209225 = 10626^2 + 2685^2 .

It is not a de Polignac number, because 120121101 - 2³ = 120121093 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: 13346789 = 120121101 / (1 + 2 + 0 + 1 + 2 + 1 + 1 + 0 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121121) 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, 6673386 + ... + 6673403.

It is an arithmetic number, because the mean of its divisors is an integer number (28918045).

Almost surely, 2^120121101 is an apocalyptic number.

It is an amenable number.

120121101 is a deficient number, since it is larger than the sum of its proper divisors (53387169).

120121101 is a wasteful number, since it uses less digits than its factorization.

120121101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13346795 (or 13346792 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 120121101 is about 10959.9772353778. The cubic root of 120121101 is about 493.4082817204.

Adding to 120121101 its reverse (101121021), we get a palindrome (221242122).

The spelling of 120121101 in words is "one hundred twenty million, one hundred twenty-one thousand, one hundred one".