12121231204 has 12 divisors (see below), whose sum is σ = 21406762300. Its totient is φ = 6005013408.

The previous prime is 12121231153. The next prime is 12121231207. The reversal of 12121231204 is 40213212121.

It can be written as a sum of positive squares in 2 ways, for example, as 9810506304 + 2310724900 = 99048^2 + 48070^2 .

It is not an unprimeable number, because it can be changed into a prime (12121231207) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 13900059 + ... + 13900930.

Almost surely, 2^12121231204 is an apocalyptic number.

It is an amenable number.

12121231204 is a deficient number, since it is larger than the sum of its proper divisors (9285531096).

12121231204 is a wasteful number, since it uses less digits than its factorization.

12121231204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27801102 (or 27801100 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 12121231204 its reverse (40213212121), we get a palindrome (52334443325).

The spelling of 12121231204 in words is "twelve billion, one hundred twenty-one million, two hundred thirty-one thousand, two hundred four".