231200121 has 8 divisors (see below), whose sum is σ = 315436000. Its totient is φ = 150548832.

The previous prime is 231200089. The next prime is 231200129. The reversal of 231200121 is 121002132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 231200121 - 2⁵ = 231200089 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231200097 and 231200106.

It is not an unprimeable number, because it can be changed into a prime (231200129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 895996 + ... + 896253.

It is an arithmetic number, because the mean of its divisors is an integer number (39429500).

Almost surely, 2^231200121 is an apocalyptic number.

It is an amenable number.

231200121 is a deficient number, since it is larger than the sum of its proper divisors (84235879).

231200121 is a wasteful number, since it uses less digits than its factorization.

231200121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792295.

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

The square root of 231200121 is about 15205.2662258837. The cubic root of 231200121 is about 613.7563791036.

Adding to 231200121 its reverse (121002132), we get a palindrome (352202253).

The spelling of 231200121 in words is "two hundred thirty-one million, two hundred thousand, one hundred twenty-one".