120111210 has 24 divisors (see below), whose sum is σ = 312289380. Its totient is φ = 32029632.

The previous prime is 120111191. The next prime is 120111223. The reversal of 120111210 is 12111021.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 117094041 + 3017169 = 10821^2 + 1737^2 .

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 120111192 and 120111201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 667195 + ... + 667374.

Almost surely, 2^120111210 is an apocalyptic number.

120111210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

120111210 is an abundant number, since it is smaller than the sum of its proper divisors (192178170).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120111210 is a wasteful number, since it uses less digits than its factorization.

120111210 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1334582 (or 1334579 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 120111210 is about 10959.5259933995. The cubic root of 120111210 is about 493.3947386231.

Adding to 120111210 its reverse (12111021), we get a palindrome (132222231).

The spelling of 120111210 in words is "one hundred twenty million, one hundred eleven thousand, two hundred ten".