221412500521346 has 16 divisors (see below), whose sum is σ = 333358432695288. Its totient is φ = 110293772236800.

The previous prime is 221412500521321. The next prime is 221412500521351. The reversal of 221412500521346 is 643125005214122.

It can be written as a sum of positive squares in 4 ways, for example, as 220595716576225 + 816783945121 = 14852465^2 + 903761^2 .

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, 186728585 + ... + 187910588.

Almost surely, 2^{221412500521346} is an apocalyptic number.

221412500521346 is a deficient number, since it is larger than the sum of its proper divisors (111945932173942).

221412500521346 is a wasteful number, since it uses less digits than its factorization.

221412500521346 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374640277.

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 221412500521346 its reverse (643125005214122), we get a palindrome (864537505735468).

The spelling of 221412500521346 in words is "two hundred twenty-one trillion, four hundred twelve billion, five hundred million, five hundred twenty-one thousand, three hundred forty-six".