1120111121 has 4 divisors (see below), whose sum is σ = 1121751792. Its totient is φ = 1118470452.

The previous prime is 1120111099. The next prime is 1120111193. The reversal of 1120111121 is 1211110211.

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: 1211110211 = 79 ⋅15330509.

It is a cyclic number.

It is not a de Polignac number, because 1120111121 - 2²⁶ = 1053002257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1120111721) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 819311 + ... + 820676.

It is an arithmetic number, because the mean of its divisors is an integer number (280437948).

Almost surely, 2^1120111121 is an apocalyptic number.

It is an amenable number.

1120111121 is a deficient number, since it is larger than the sum of its proper divisors (1640671).

1120111121 is an equidigital number, since it uses as much as digits as its factorization.

1120111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1640670.

The product of its (nonzero) digits is 4, while the sum is 11.

The square root of 1120111121 is about 33468.0612076648. The cubic root of 1120111121 is about 1038.5331641831.

Adding to 1120111121 its reverse (1211110211), we get a palindrome (2331221332).

It can be divided in two parts, 11201 and 11121, that added together give a palindrome (22322).

The spelling of 1120111121 in words is "one billion, one hundred twenty million, one hundred eleven thousand, one hundred twenty-one".