12421243402 has 8 divisors (see below), whose sum is σ = 19274343300. Its totient is φ = 5996462304.

The previous prime is 12421243363. The next prime is 12421243411. The reversal of 12421243402 is 20434212421.

It can be written as a sum of positive squares in 2 ways, for example, as 12376340001 + 44903401 = 111249^2 + 6701^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107079627 + ... + 107079742.

Almost surely, 2^12421243402 is an apocalyptic number.

12421243402 is a deficient number, since it is larger than the sum of its proper divisors (6853099898).

12421243402 is a wasteful number, since it uses less digits than its factorization.

12421243402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214159400.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 12421243402 its reverse (20434212421), we get a palindrome (32855455823).

The spelling of 12421243402 in words is "twelve billion, four hundred twenty-one million, two hundred forty-three thousand, four hundred two".