1113121253 has 4 divisors (see below), whose sum is σ = 1113411948. Its totient is φ = 1112830560.

The previous prime is 1113121249. The next prime is 1113121267. The reversal of 1113121253 is 3521213111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 647295364 + 465825889 = 25442^2 + 21583^2 .

It is a cyclic number.

It is not a de Polignac number, because 1113121253 - 2² = 1113121249 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113121753) 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, 139526 + ... + 147287.

It is an arithmetic number, because the mean of its divisors is an integer number (278352987).

Almost surely, 2^1113121253 is an apocalyptic number.

It is an amenable number.

1113121253 is a deficient number, since it is larger than the sum of its proper divisors (290695).

1113121253 is an equidigital number, since it uses as much as digits as its factorization.

1113121253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 290694.

The product of its digits is 180, while the sum is 20.

The square root of 1113121253 is about 33363.4718367259. The cubic root of 1113121253 is about 1036.3683901922.

Adding to 1113121253 its reverse (3521213111), we get a palindrome (4634334364).

The spelling of 1113121253 in words is "one billion, one hundred thirteen million, one hundred twenty-one thousand, two hundred fifty-three".