120101989 has 12 divisors (see below), whose sum is σ = 141799584. Its totient is φ = 101405304.

The previous prime is 120101987. The next prime is 120101999. The reversal of 120101989 is 989101021.

It is not a de Polignac number, because 120101989 - 2¹ = 120101987 is a prime.

It is a super-2 number, since 2×120101989² = 28848975523512242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120101989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120101987) 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 11 ways as a sum of consecutive naturals, for example, 15009 + ... + 21574.

It is an arithmetic number, because the mean of its divisors is an integer number (11816632).

Almost surely, 2^120101989 is an apocalyptic number.

It is an amenable number.

120101989 is a deficient number, since it is larger than the sum of its proper divisors (21697595).

120101989 is an equidigital number, since it uses as much as digits as its factorization.

120101989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36664 (or 36657 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 31.

The square root of 120101989 is about 10959.1053010727. The cubic root of 120101989 is about 493.3821122432.

The spelling of 120101989 in words is "one hundred twenty million, one hundred one thousand, nine hundred eighty-nine".