120221311 has 4 divisors (see below), whose sum is σ = 137395792. Its totient is φ = 103046832.

The previous prime is 120221293. The next prime is 120221323. The reversal of 120221311 is 113122021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 113122021 = 2791 ⋅40531.

It is not a de Polignac number, because 120221311 - 2¹¹ = 120219263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120221291 and 120221300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120221711) 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, 8587230 + ... + 8587243.

It is an arithmetic number, because the mean of its divisors is an integer number (34348948).

Almost surely, 2^120221311 is an apocalyptic number.

120221311 is a deficient number, since it is larger than the sum of its proper divisors (17174481).

120221311 is an equidigital number, since it uses as much as digits as its factorization.

120221311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17174480.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 120221311 is about 10964.5479158969. The cubic root of 120221311 is about 493.5454507949.

Adding to 120221311 its reverse (113122021), we get a palindrome (233343332).

The spelling of 120221311 in words is "one hundred twenty million, two hundred twenty-one thousand, three hundred eleven".