221100002012 has 6 divisors (see below), whose sum is σ = 386925003528. Its totient is φ = 110550001004.

The previous prime is 221100001921. The next prime is 221100002051. The reversal of 221100002012 is 210200001122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 221100001984 and 221100002002.

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, 27637500248 + ... + 27637500255.

It is an arithmetic number, because the mean of its divisors is an integer number (64487500588).

Almost surely, 2^221100002012 is an apocalyptic number.

It is an amenable number.

221100002012 is a deficient number, since it is larger than the sum of its proper divisors (165825001516).

221100002012 is a wasteful number, since it uses less digits than its factorization.

221100002012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55275000507 (or 55275000505 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 221100002012 its reverse (210200001122), we get a palindrome (431300003134).

The spelling of 221100002012 in words is "two hundred twenty-one billion, one hundred million, two thousand, twelve".