221432217601612 has 6 divisors (see below), whose sum is σ = 387506380802828. Its totient is φ = 110716108800804.

The previous prime is 221432217601603. The next prime is 221432217601649. The reversal of 221432217601612 is 216106712234122.

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 as a sum of consecutive naturals, namely, 27679027200198 + ... + 27679027200205.

Almost surely, 2^{221432217601612} is an apocalyptic number.

It is an amenable number.

221432217601612 is a deficient number, since it is larger than the sum of its proper divisors (166074163201216).

221432217601612 is a wasteful number, since it uses less digits than its factorization.

221432217601612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55358054400407 (or 55358054400405 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 40.

Adding to 221432217601612 its reverse (216106712234122), we get a palindrome (437538929835734).

The spelling of 221432217601612 in words is "two hundred twenty-one trillion, four hundred thirty-two billion, two hundred seventeen million, six hundred one thousand, six hundred twelve".