121312200 has 48 divisors (see below), whose sum is σ = 376069680. Its totient is φ = 32349760.

The previous prime is 121312199. The next prime is 121312229. The reversal of 121312200 is 2213121.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 100494 + ... + 101693.

It is an arithmetic number, because the mean of its divisors is an integer number (7834785).

Almost surely, 2^121312200 is an apocalyptic number.

121312200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121312200 is an abundant number, since it is smaller than the sum of its proper divisors (254757480).

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

121312200 is a wasteful number, since it uses less digits than its factorization.

121312200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 202206 (or 202197 counting only the distinct ones).

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

The square root of 121312200 is about 11014.1817671582. The cubic root of 121312200 is about 495.0337697602.

Adding to 121312200 its reverse (2213121), we get a palindrome (123525321).

The spelling of 121312200 in words is "one hundred twenty-one million, three hundred twelve thousand, two hundred".