243121232200 has 144 divisors (see below), whose sum is σ = 717320718000. Its totient is φ = 75778012800.

The previous prime is 243121232171. The next prime is 243121232227. The reversal of 243121232200 is 2232121342.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1019850 + ... + 1235449.

It is an arithmetic number, because the mean of its divisors is an integer number (4981393875).

Almost surely, 2^243121232200 is an apocalyptic number.

243121232200 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243121232200 is an abundant number, since it is smaller than the sum of its proper divisors (474199485800).

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

243121232200 is a wasteful number, since it uses less digits than its factorization.

243121232200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255340 (or 2255324 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 243121232200 its reverse (2232121342), we get a palindrome (245353353542).

The spelling of 243121232200 in words is "two hundred forty-three billion, one hundred twenty-one million, two hundred thirty-two thousand, two hundred".