120221001 has 6 divisors (see below), whose sum is σ = 173652570. Its totient is φ = 80147328.

The previous prime is 120220993. The next prime is 120221021. The reversal of 120221001 is 100122021.

It can be written as a sum of positive squares in only one way, i.e., 107433225 + 12787776 = 10365^2 + 3576^2 .

It is not a de Polignac number, because 120221001 - 2³ = 120220993 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: 13357889 = 120221001 / (1 + 2 + 0 + 2 + 2 + 1 + 0 + 0 + 1).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (120221021) 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, 6678936 + ... + 6678953.

It is an arithmetic number, because the mean of its divisors is an integer number (28942095).

Almost surely, 2^120221001 is an apocalyptic number.

It is an amenable number.

120221001 is a deficient number, since it is larger than the sum of its proper divisors (53431569).

120221001 is a wasteful number, since it uses less digits than its factorization.

120221001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13357895 (or 13357892 counting only the distinct ones).

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

The square root of 120221001 is about 10964.5337794181. The cubic root of 120221001 is about 493.5450265794.

Adding to 120221001 its reverse (100122021), we get a palindrome (220343022).

The spelling of 120221001 in words is "one hundred twenty million, two hundred twenty-one thousand, one".