6421401212 has 24 divisors (see below), whose sum is σ = 11628081360. Its totient is φ = 3099152000.

The previous prime is 6421401193. The next prime is 6421401251. The reversal of 6421401212 is 2121041246.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 808163 + ... + 816069.

It is an arithmetic number, because the mean of its divisors is an integer number (484503390).

Almost surely, 2^6421401212 is an apocalyptic number.

It is an amenable number.

6421401212 is a deficient number, since it is larger than the sum of its proper divisors (5206680148).

6421401212 is a wasteful number, since it uses less digits than its factorization.

6421401212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14941 (or 14939 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 6421401212 is about 80133.6459422632. The cubic root of 6421401212 is about 1858.7027231905.

Adding to 6421401212 its reverse (2121041246), we get a palindrome (8542442458).

The spelling of 6421401212 in words is "six billion, four hundred twenty-one million, four hundred one thousand, two hundred twelve".