12261319924 has 12 divisors (see below), whose sum is σ = 24522639904. Its totient is φ = 5254851384.

The previous prime is 12261319891. The next prime is 12261319943. The reversal of 12261319924 is 42991316221.

12261319924 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 218952114 + ... + 218952169.

Almost surely, 2^12261319924 is an apocalyptic number.

12261319924 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12261319924 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12261319924 is a wasteful number, since it uses less digits than its factorization.

12261319924 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 437904294 (or 437904292 counting only the distinct ones).

The product of its digits is 46656, while the sum is 40.

The spelling of 12261319924 in words is "twelve billion, two hundred sixty-one million, three hundred nineteen thousand, nine hundred twenty-four".