12121131230 has 24 divisors (see below), whose sum is σ = 23625450792. Its totient is φ = 4475493984.

The previous prime is 12121131199. The next prime is 12121131241. The reversal of 12121131230 is 3213112121.

It is a junction number, because it is equal to n+sod(n) for n = 12121131199 and 12121131208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3584444 + ... + 3587823.

It is an arithmetic number, because the mean of its divisors is an integer number (984393783).

Almost surely, 2^12121131230 is an apocalyptic number.

12121131230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12121131230 is a deficient number, since it is larger than the sum of its proper divisors (11504319562).

12121131230 is a wasteful number, since it uses less digits than its factorization.

12121131230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7172300 (or 7172287 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 12121131230 its reverse (3213112121), we get a palindrome (15334243351).

The spelling of 12121131230 in words is "twelve billion, one hundred twenty-one million, one hundred thirty-one thousand, two hundred thirty".