120555221 has 4 divisors (see below), whose sum is σ = 120578592. Its totient is φ = 120531852.

The previous prime is 120555203. The next prime is 120555241. The reversal of 120555221 is 122555021.

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 120555221 - 2⁶ = 120555157 is a prime.

It is a super-2 number, since 2×120555221² = 29067122620717682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120555241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155 + ... + 15528.

It is an arithmetic number, because the mean of its divisors is an integer number (30144648).

Almost surely, 2^120555221 is an apocalyptic number.

It is an amenable number.

120555221 is a deficient number, since it is larger than the sum of its proper divisors (23371).

120555221 is an equidigital number, since it uses as much as digits as its factorization.

120555221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23370.

The product of its (nonzero) digits is 1000, while the sum is 23.

The square root of 120555221 is about 10979.7641595801. The cubic root of 120555221 is about 494.0019628174.

The spelling of 120555221 in words is "one hundred twenty million, five hundred fifty-five thousand, two hundred twenty-one".