120121111 has 8 divisors (see below), whose sum is σ = 136738944. Its totient is φ = 104452920.

The previous prime is 120121093. The next prime is 120121121. The reversal of 120121111 is 111121021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120121111 - 2¹¹ = 120119063 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120121121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 237141 + ... + 237646.

It is an arithmetic number, because the mean of its divisors is an integer number (17092368).

Almost surely, 2^120121111 is an apocalyptic number.

120121111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

120121111 is a deficient number, since it is larger than the sum of its proper divisors (16617833).

120121111 is a wasteful number, since it uses less digits than its factorization.

120121111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474821.

The product of its (nonzero) digits is 4, while the sum is 10.

The square root of 120121111 is about 10959.9776915831. The cubic root of 120121111 is about 493.4082954123.

Adding to 120121111 its reverse (111121021), we get a palindrome (231242132).

The spelling of 120121111 in words is "one hundred twenty million, one hundred twenty-one thousand, one hundred eleven".