221430240332212 has 96 divisors (see below), whose sum is σ = 419469072422400. Its totient is φ = 101877837723648.

The previous prime is 221430240332209. The next prime is 221430240332227. The reversal of 221430240332212 is 212233042034122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16199440114 + ... + 16199453782.

It is an arithmetic number, because the mean of its divisors is an integer number (4369469504400).

Almost surely, 2^{221430240332212} is an apocalyptic number.

It is an amenable number.

221430240332212 is a deficient number, since it is larger than the sum of its proper divisors (198038832090188).

221430240332212 is a wasteful number, since it uses less digits than its factorization.

221430240332212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18713 (or 18711 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 31.

Adding to 221430240332212 its reverse (212233042034122), we get a palindrome (433663282366334).

The spelling of 221430240332212 in words is "two hundred twenty-one trillion, four hundred thirty billion, two hundred forty million, three hundred thirty-two thousand, two hundred twelve".