1123203101 has 4 divisors (see below), whose sum is σ = 1125279804. Its totient is φ = 1121126400.

The previous prime is 1123203097. The next prime is 1123203127. The reversal of 1123203101 is 1013023211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1013023211 = 1487 ⋅681253.

It can be written as a sum of positive squares in 2 ways, for example, as 479566201 + 643636900 = 21899^2 + 25370^2 .

It is a cyclic number.

It is not a de Polignac number, because 1123203101 - 2² = 1123203097 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1123203701) 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, 1037540 + ... + 1038621.

It is an arithmetic number, because the mean of its divisors is an integer number (281319951).

Almost surely, 2^1123203101 is an apocalyptic number.

It is an amenable number.

1123203101 is a deficient number, since it is larger than the sum of its proper divisors (2076703).

1123203101 is an equidigital number, since it uses as much as digits as its factorization.

1123203101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2076702.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 1123203101 is about 33514.2223690182. Note that the first 3 decimals coincide. The cubic root of 1123203101 is about 1039.4878830348.

Adding to 1123203101 its reverse (1013023211), we get a palindrome (2136226312).

The spelling of 1123203101 in words is "one billion, one hundred twenty-three million, two hundred three thousand, one hundred one".