12400421332 has 24 divisors (see below), whose sum is σ = 23386406400. Its totient is φ = 5719259616.

The previous prime is 12400421329. The next prime is 12400421339. The reversal of 12400421332 is 23312400421.

It is a super-2 number, since 2×12400421332² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400421339) 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 7 ways as a sum of consecutive naturals, for example, 8032 + ... + 157687.

It is an arithmetic number, because the mean of its divisors is an integer number (974433600).

Almost surely, 2^12400421332 is an apocalyptic number.

It is an amenable number.

12400421332 is a deficient number, since it is larger than the sum of its proper divisors (10985985068).

12400421332 is a wasteful number, since it uses less digits than its factorization.

12400421332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167175 (or 167173 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

Adding to 12400421332 its reverse (23312400421), we get a palindrome (35712821753).

The spelling of 12400421332 in words is "twelve billion, four hundred million, four hundred twenty-one thousand, three hundred thirty-two".