1120121111 has 4 divisors (see below), whose sum is σ = 1124285400. Its totient is φ = 1115956824.

The previous prime is 1120121099. The next prime is 1120121113. The reversal of 1120121111 is 1111210211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1120121111 - 2³⁰ = 46379287 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1120121092 and 1120121101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120121113) 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, 2081741 + ... + 2082278.

It is an arithmetic number, because the mean of its divisors is an integer number (281071350).

Almost surely, 2^1120121111 is an apocalyptic number.

1120121111 is a deficient number, since it is larger than the sum of its proper divisors (4164289).

1120121111 is an equidigital number, since it uses as much as digits as its factorization.

1120121111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4164288.

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

The square root of 1120121111 is about 33468.2104541011. The cubic root of 1120121111 is about 1038.5362516492.

Adding to 1120121111 its reverse (1111210211), we get a palindrome (2231331322).

The spelling of 1120121111 in words is "one billion, one hundred twenty million, one hundred twenty-one thousand, one hundred eleven".