621212420012 has 24 divisors (see below), whose sum is σ = 1110787177920. Its totient is φ = 303894556560.

The previous prime is 621212420009. The next prime is 621212420033. The reversal of 621212420012 is 210024212126.

It is a self number, because there is not a number n which added to its sum of digits gives 621212420012.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6187778 + ... + 6287369.

It is an arithmetic number, because the mean of its divisors is an integer number (46282799080).

Almost surely, 2^621212420012 is an apocalyptic number.

It is an amenable number.

621212420012 is a deficient number, since it is larger than the sum of its proper divisors (489574757908).

621212420012 is a wasteful number, since it uses less digits than its factorization.

621212420012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12475421 (or 12475419 counting only the distinct ones).

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

Adding to 621212420012 its reverse (210024212126), we get a palindrome (831236632138).

The spelling of 621212420012 in words is "six hundred twenty-one billion, two hundred twelve million, four hundred twenty thousand, twelve".