221310400412 has 12 divisors (see below), whose sum is σ = 387804821880. Its totient is φ = 110509022736.

The previous prime is 221310400391. The next prime is 221310400439. The reversal of 221310400412 is 214004013122.

221310400412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36540962 + ... + 36547017.

It is an arithmetic number, because the mean of its divisors is an integer number (32317068490).

Almost surely, 2^221310400412 is an apocalyptic number.

It is an amenable number.

221310400412 is a deficient number, since it is larger than the sum of its proper divisors (166494421468).

221310400412 is a wasteful number, since it uses less digits than its factorization.

221310400412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73088740 (or 73088738 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 221310400412 its reverse (214004013122), we get a palindrome (435314413534).

The spelling of 221310400412 in words is "two hundred twenty-one billion, three hundred ten million, four hundred thousand, four hundred twelve".