1123352121 has 4 divisors (see below), whose sum is σ = 1497802832. Its totient is φ = 748901412.

The previous prime is 1123352101. The next prime is 1123352137. The reversal of 1123352121 is 1212533211.

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.

It is not a de Polignac number, because 1123352121 - 2⁵ = 1123352089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123352101) 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, 187225351 + ... + 187225356.

It is an arithmetic number, because the mean of its divisors is an integer number (374450708).

Almost surely, 2^1123352121 is an apocalyptic number.

It is an amenable number.

1123352121 is a deficient number, since it is larger than the sum of its proper divisors (374450711).

1123352121 is an equidigital number, since it uses as much as digits as its factorization.

1123352121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374450710.

The product of its digits is 360, while the sum is 21.

The square root of 1123352121 is about 33516.4455305153. The cubic root of 1123352121 is about 1039.5338520538.

Adding to 1123352121 its reverse (1212533211), we get a palindrome (2335885332).

The spelling of 1123352121 in words is "one billion, one hundred twenty-three million, three hundred fifty-two thousand, one hundred twenty-one".