1123434121 has 4 divisors (see below), whose sum is σ = 1124190100. Its totient is φ = 1122678144.

The previous prime is 1123434107. The next prime is 1123434131. The reversal of 1123434121 is 1214343211.

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 152176896 + 971257225 = 12336^2 + 31165^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123434121 - 2¹⁹ = 1122909833 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1123434092 and 1123434101.

It is not an unprimeable number, because it can be changed into a prime (1123434131) 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, 375756 + ... + 378733.

It is an arithmetic number, because the mean of its divisors is an integer number (281047525).

Almost surely, 2^1123434121 is an apocalyptic number.

It is an amenable number.

1123434121 is a deficient number, since it is larger than the sum of its proper divisors (755979).

1123434121 is an equidigital number, since it uses as much as digits as its factorization.

1123434121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755978.

The product of its digits is 576, while the sum is 22.

The square root of 1123434121 is about 33517.6687882675. The cubic root of 1123434121 is about 1039.5591453109.

Adding to 1123434121 its reverse (1214343211), we get a palindrome (2337777332).

The spelling of 1123434121 in words is "one billion, one hundred twenty-three million, four hundred thirty-four thousand, one hundred twenty-one".