1123203100 has 18 divisors (see below), whose sum is σ = 2437350944. Its totient is φ = 449281200.

The previous prime is 1123203097. The next prime is 1123203127. The reversal of 1123203100 is 13023211.

It is a super-2 number, since 2×1123203100² = 2523170407699220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5615916 + ... + 5616115.

Almost surely, 2^1123203100 is an apocalyptic number.

1123203100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123203100 is an abundant number, since it is smaller than the sum of its proper divisors (1314147844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1123203100 is a wasteful number, since it uses less digits than its factorization.

1123203100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11232045 (or 11232038 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 13.

The square root of 1123203100 is about 33514.2223540992. Note that the first 3 decimals coincide. The cubic root of 1123203100 is about 1039.4878827263.

Adding to 1123203100 its reverse (13023211), we get a palindrome (1136226311).

The spelling of 1123203100 in words is "one billion, one hundred twenty-three million, two hundred three thousand, one hundred".