111000121 has 4 divisors (see below), whose sum is σ = 111021712. Its totient is φ = 110978532.

The previous prime is 111000103. The next prime is 111000163. The reversal of 111000121 is 121000111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 121000111 = 3931 ⋅30781.

It is a cyclic number.

It is not a de Polignac number, because 111000121 - 2¹⁷ = 110869049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111000101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1870 + ... + 15016.

It is an arithmetic number, because the mean of its divisors is an integer number (27755428).

Almost surely, 2^111000121 is an apocalyptic number.

It is an amenable number.

111000121 is a deficient number, since it is larger than the sum of its proper divisors (21591).

111000121 is an equidigital number, since it uses as much as digits as its factorization.

111000121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21590.

The product of its (nonzero) digits is 2, while the sum is 7.

The square root of 111000121 is about 10535.6594952570. The cubic root of 111000121 is about 480.5897279991.

Adding to 111000121 its reverse (121000111), we get a palindrome (232000232).

The spelling of 111000121 in words is "one hundred eleven million, one hundred twenty-one", and thus it is an aban number.