120011221 has 12 divisors (see below), whose sum is σ = 132159744. Its totient is φ = 108075800.

The previous prime is 120011219. The next prime is 120011231. The reversal of 120011221 is 122110021.

It is not a de Polignac number, because 120011221 - 2¹ = 120011219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120011198 and 120011207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120011231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 502020 + ... + 502258.

It is an arithmetic number, because the mean of its divisors is an integer number (11013312).

Almost surely, 2^120011221 is an apocalyptic number.

120011221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

120011221 is a deficient number, since it is larger than the sum of its proper divisors (12148523).

120011221 is an equidigital number, since it uses as much as digits as its factorization.

120011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 120011221 is about 10954.9633043657. The cubic root of 120011221 is about 493.2577884790.

Adding to 120011221 its reverse (122110021), we get a palindrome (242121242).

It can be divided in two parts, 1200 and 11221, that added together give a palindrome (12421).

The spelling of 120011221 in words is "one hundred twenty million, eleven thousand, two hundred twenty-one".