123112200 has 48 divisors (see below), whose sum is σ = 381649680. Its totient is φ = 32829760.

The previous prime is 123112189. The next prime is 123112201. The reversal of 123112200 is 2211321.

It is a super-2 number, since 2×123112200² = 30313227577680000, 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 (123112201) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 101994 + ... + 103193.

It is an arithmetic number, because the mean of its divisors is an integer number (7951035).

Almost surely, 2^123112200 is an apocalyptic number.

123112200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123112200 is an abundant number, since it is smaller than the sum of its proper divisors (258537480).

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

123112200 is a wasteful number, since it uses less digits than its factorization.

123112200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205206 (or 205197 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 123112200 is about 11095.5937200314. The cubic root of 123112200 is about 497.4701546871.

Adding to 123112200 its reverse (2211321), we get a palindrome (125323521).

It can be divided in two parts, 1231 and 12200, that added together give a palindrome (13431).

The spelling of 123112200 in words is "one hundred twenty-three million, one hundred twelve thousand, two hundred".