120135221 has 8 divisors (see below), whose sum is σ = 123477120. Its totient is φ = 116839008.

The previous prime is 120135203. The next prime is 120135241. The reversal of 120135221 is 122531021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 120135221 - 2¹⁴ = 120118837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120135221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120135241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6056 + ... + 16641.

It is an arithmetic number, because the mean of its divisors is an integer number (15434640).

Almost surely, 2^120135221 is an apocalyptic number.

It is an amenable number.

120135221 is a deficient number, since it is larger than the sum of its proper divisors (3341899).

120135221 is an equidigital number, since it uses as much as digits as its factorization.

120135221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22843.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 120135221 is about 10960.6213783708. The cubic root of 120135221 is about 493.4276140217.

Adding to 120135221 its reverse (122531021), we get a palindrome (242666242).

The spelling of 120135221 in words is "one hundred twenty million, one hundred thirty-five thousand, two hundred twenty-one".