1123203131 has 8 divisors (see below), whose sum is σ = 1135614144. Its totient is φ = 1110853440.

The previous prime is 1123203127. The next prime is 1123203149. The reversal of 1123203131 is 1313023211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1123203131 - 2² = 1123203127 is a prime.

It is a super-2 number, since 2×1123203131² = 2523170546976406322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1123202131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22001 + ... + 52253.

It is an arithmetic number, because the mean of its divisors is an integer number (141951768).

Almost surely, 2^1123203131 is an apocalyptic number.

1123203131 is a deficient number, since it is larger than the sum of its proper divisors (12411013).

1123203131 is a wasteful number, since it uses less digits than its factorization.

1123203131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30661.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1123203131 is about 33514.2228165894. Note that the first 3 decimals coincide. The cubic root of 1123203131 is about 1039.4878922895.

Adding to 1123203131 its reverse (1313023211), we get a palindrome (2436226342).

The spelling of 1123203131 in words is "one billion, one hundred twenty-three million, two hundred three thousand, one hundred thirty-one".