1113120121 has 4 divisors (see below), whose sum is σ = 1161516672. Its totient is φ = 1064723572.

The previous prime is 1113120119. The next prime is 1113120143. The reversal of 1113120121 is 1210213111.

It is a happy number.

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: 1210213111 = 1381 ⋅876331.

It is a cyclic number.

It is not a de Polignac number, because 1113120121 - 2¹ = 1113120119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1113120721) 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, 24198241 + ... + 24198286.

It is an arithmetic number, because the mean of its divisors is an integer number (290379168).

Almost surely, 2^1113120121 is an apocalyptic number.

It is an amenable number.

1113120121 is a deficient number, since it is larger than the sum of its proper divisors (48396551).

1113120121 is an equidigital number, since it uses as much as digits as its factorization.

1113120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48396550.

The product of its (nonzero) digits is 12, while the sum is 13.

The square root of 1113120121 is about 33363.4548720602. The cubic root of 1113120121 is about 1036.3680388769.

Adding to 1113120121 its reverse (1210213111), we get a palindrome (2323333232).

The spelling of 1113120121 in words is "one billion, one hundred thirteen million, one hundred twenty thousand, one hundred twenty-one".