1123111200 has 72 divisors (see below), whose sum is σ = 3655734768. Its totient is φ = 299495680.

The previous prime is 1123111193. The next prime is 1123111207. The reversal of 1123111200 is 21113211.

It is an interprime number because it is at equal distance from previous prime (1123111193) and next prime (1123111207).

It is a super-2 number, since 2×1123111200² = 2522757535130880000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is not an unprimeable number, because it can be changed into a prime (1123111207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 231582 + ... + 236381.

It is an arithmetic number, because the mean of its divisors is an integer number (50774094).

Almost surely, 2^1123111200 is an apocalyptic number.

1123111200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1123111200 is an abundant number, since it is smaller than the sum of its proper divisors (2532623568).

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

1123111200 is a wasteful number, since it uses less digits than its factorization.

1123111200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467986 (or 467973 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 12.

The square root of 1123111200 is about 33512.8512663426. The cubic root of 1123111200 is about 1039.4595318009.

Adding to 1123111200 its reverse (21113211), we get a palindrome (1144224411).

The spelling of 1123111200 in words is "one billion, one hundred twenty-three million, one hundred eleven thousand, two hundred".