231121200212 has 36 divisors (see below), whose sum is σ = 477123472224. Its totient is φ = 97656839280.

The previous prime is 231121200179. The next prime is 231121200253. The reversal of 231121200212 is 212002121132.

It is a congruent number.

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, 8290238 + ... + 8318069.

It is an arithmetic number, because the mean of its divisors is an integer number (13253429784).

Almost surely, 2^231121200212 is an apocalyptic number.

It is an amenable number.

231121200212 is an abundant number, since it is smaller than the sum of its proper divisors (246002272012).

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

231121200212 is a wasteful number, since it uses less digits than its factorization.

231121200212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16608396 (or 16608387 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 231121200212 its reverse (212002121132), we get a palindrome (443123321344).

The spelling of 231121200212 in words is "two hundred thirty-one billion, one hundred twenty-one million, two hundred thousand, two hundred twelve".