120312221 has 4 divisors (see below), whose sum is σ = 120336672. Its totient is φ = 120287772.

The previous prime is 120312217. The next prime is 120312233. The reversal of 120312221 is 122213021.

It is a happy number.

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 120312221 - 2² = 120312217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120312196 and 120312205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120312121) 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, 1985 + ... + 15638.

It is an arithmetic number, because the mean of its divisors is an integer number (30084168).

Almost surely, 2^120312221 is an apocalyptic number.

It is an amenable number.

120312221 is a deficient number, since it is larger than the sum of its proper divisors (24451).

120312221 is an equidigital number, since it uses as much as digits as its factorization.

120312221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24450.

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 120312221 is about 10968.6927662324. The cubic root of 120312221 is about 493.6698239521.

Adding to 120312221 its reverse (122213021), we get a palindrome (242525242).

The spelling of 120312221 in words is "one hundred twenty million, three hundred twelve thousand, two hundred twenty-one".