12421500042 has 32 divisors (see below), whose sum is σ = 29052283392. Its totient is φ = 3466464624.

The previous prime is 12421500001. The next prime is 12421500053. The reversal of 12421500042 is 24000512421.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 12421499991 and 12421500018.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 3437148 + ... + 3440759.

It is an arithmetic number, because the mean of its divisors is an integer number (907883856).

Almost surely, 2^12421500042 is an apocalyptic number.

12421500042 is an abundant number, since it is smaller than the sum of its proper divisors (16630783350).

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

12421500042 is a wasteful number, since it uses less digits than its factorization.

12421500042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6877962.

The product of its (nonzero) digits is 640, while the sum is 21.

The spelling of 12421500042 in words is "twelve billion, four hundred twenty-one million, five hundred thousand, forty-two".