12400021696 has 14 divisors (see below), whose sum is σ = 24606293180. Its totient is φ = 6200010816.

The previous prime is 12400021693. The next prime is 12400021729. The reversal of 12400021696 is 69612000421.

It is a super-2 number, since 2×12400021696² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12400021691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 96875106 + ... + 96875233.

It is an arithmetic number, because the mean of its divisors is an integer number (1757592370).

Almost surely, 2^12400021696 is an apocalyptic number.

12400021696 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12400021696 is a deficient number, since it is larger than the sum of its proper divisors (12206271484).

12400021696 is an equidigital number, since it uses as much as digits as its factorization.

12400021696 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193750351 (or 193750341 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The spelling of 12400021696 in words is "twelve billion, four hundred million, twenty-one thousand, six hundred ninety-six".