1113031121 has 4 divisors (see below), whose sum is σ = 1113102132. Its totient is φ = 1112960112.

The previous prime is 1113031103. The next prime is 1113031147. The reversal of 1113031121 is 1211303111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 639533521 + 473497600 = 25289^2 + 21760^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113031121 - 2¹⁰ = 1113030097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1113031096 and 1113031105.

It is not an unprimeable number, because it can be changed into a prime (1113031421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 470 + ... + 47183.

It is an arithmetic number, because the mean of its divisors is an integer number (278275533).

Almost surely, 2^1113031121 is an apocalyptic number.

It is an amenable number.

1113031121 is a deficient number, since it is larger than the sum of its proper divisors (71011).

1113031121 is an equidigital number, since it uses as much as digits as its factorization.

1113031121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71010.

The product of its (nonzero) digits is 18, while the sum is 14.

The square root of 1113031121 is about 33362.1210506766. The cubic root of 1113031121 is about 1036.3404170561.

Adding to 1113031121 its reverse (1211303111), we get a palindrome (2324334232).

The spelling of 1113031121 in words is "one billion, one hundred thirteen million, thirty-one thousand, one hundred twenty-one".