120211221 has 24 divisors (see below), whose sum is σ = 177823296. Its totient is φ = 72159360.

The previous prime is 120211213. The next prime is 120211237. The reversal of 120211221 is 122112021.

It is not a de Polignac number, because 120211221 - 2³ = 120211213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 120211197 and 120211206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120211241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17896 + ... + 23678.

It is an arithmetic number, because the mean of its divisors is an integer number (7409304).

Almost surely, 2^120211221 is an apocalyptic number.

It is an amenable number.

120211221 is a deficient number, since it is larger than the sum of its proper divisors (57612075).

120211221 is a wasteful number, since it uses less digits than its factorization.

120211221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5853 (or 5840 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

The square root of 120211221 is about 10964.0877869525. The cubic root of 120211221 is about 493.5316428910.

Adding to 120211221 its reverse (122112021), we get a palindrome (242323242).

It can be divided in two parts, 12021 and 1221, that multiplied together give a palindrome (14677641).

The spelling of 120211221 in words is "one hundred twenty million, two hundred eleven thousand, two hundred twenty-one".