12231121000 has 64 divisors (see below), whose sum is σ = 32709530880. Its totient is φ = 4193524800.

The previous prime is 12231120989. The next prime is 12231121027. The reversal of 12231121000 is 12113221.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 866652 + ... + 880651.

It is an arithmetic number, because the mean of its divisors is an integer number (511086420).

Almost surely, 2^12231121000 is an apocalyptic number.

12231121000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12231121000 is an abundant number, since it is smaller than the sum of its proper divisors (20478409880).

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

12231121000 is a wasteful number, since it uses less digits than its factorization.

12231121000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1747331 (or 1747317 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 12231121000 its reverse (12113221), we get a palindrome (12243234221).

The spelling of 12231121000 in words is "twelve billion, two hundred thirty-one million, one hundred twenty-one thousand".