221100033212 has 6 divisors (see below), whose sum is σ = 386925058128. Its totient is φ = 110550016604.

The previous prime is 221100033107. The next prime is 221100033223. The reversal of 221100033212 is 212330001122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27637504148 + ... + 27637504155.

It is an arithmetic number, because the mean of its divisors is an integer number (64487509688).

Almost surely, 2^221100033212 is an apocalyptic number.

It is an amenable number.

221100033212 is a deficient number, since it is larger than the sum of its proper divisors (165825024916).

221100033212 is a wasteful number, since it uses less digits than its factorization.

221100033212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55275008307 (or 55275008305 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 221100033212 its reverse (212330001122), we get a palindrome (433430034334).

The spelling of 221100033212 in words is "two hundred twenty-one billion, one hundred million, thirty-three thousand, two hundred twelve".