12420212402 has 8 divisors (see below), whose sum is σ = 20063420076. Its totient is φ = 5732405712.

The previous prime is 12420212401. The next prime is 12420212447. The reversal of 12420212402 is 20421202421.

12420212402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 10995829321 + 1424383081 = 104861^2 + 37741^2 .

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

It is a super-2 number, since 2×12420212402² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12420212401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238850213 + ... + 238850264.

Almost surely, 2^12420212402 is an apocalyptic number.

12420212402 is a deficient number, since it is larger than the sum of its proper divisors (7643207674).

12420212402 is a wasteful number, since it uses less digits than its factorization.

12420212402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477700492.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 12420212402 its reverse (20421202421), we get a palindrome (32841414823).

The spelling of 12420212402 in words is "twelve billion, four hundred twenty million, two hundred twelve thousand, four hundred two".