221412433212 has 36 divisors (see below), whose sum is σ = 566766010720. Its totient is φ = 72869913792.

The previous prime is 221412433201. The next prime is 221412433219. The reversal of 221412433212 is 212334214122.

221412433212 is a `hidden beast` number, since 2 + 2 + 1 + 4 + 12 + 433 + 212 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221412433219) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38923393 + ... + 38929080.

Almost surely, 2^221412433212 is an apocalyptic number.

It is an amenable number.

221412433212 is an abundant number, since it is smaller than the sum of its proper divisors (345353577508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221412433212 is a wasteful number, since it uses less digits than its factorization.

221412433212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77852562 (or 77852557 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

Adding to 221412433212 its reverse (212334214122), we get a palindrome (433746647334).

The spelling of 221412433212 in words is "two hundred twenty-one billion, four hundred twelve million, four hundred thirty-three thousand, two hundred twelve".