120221911 has 16 divisors (see below), whose sum is σ = 131420160. Its totient is φ = 109594080.

The previous prime is 120221891. The next prime is 120221923. The reversal of 120221911 is 119122021.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 120221911 - 2⁵ = 120221879 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120221951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53370 + ... + 55576.

It is an arithmetic number, because the mean of its divisors is an integer number (8213760).

Almost surely, 2^120221911 is an apocalyptic number.

120221911 is a deficient number, since it is larger than the sum of its proper divisors (11198249).

120221911 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (120221910) it forms an eRAP, since the sums of their prime factors are consecutive (2333 and 2334).

120221911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2334.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 120221911 is about 10964.5752767720. The cubic root of 120221911 is about 493.5462718550.

Adding to 120221911 its reverse (119122021), we get a palindrome (239343932).

The spelling of 120221911 in words is "one hundred twenty million, two hundred twenty-one thousand, nine hundred eleven".