221010321212 has 6 divisors (see below), whose sum is σ = 386768062128. Its totient is φ = 110505160604.

The previous prime is 221010321209. The next prime is 221010321221. The reversal of 221010321212 is 212123010122.

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, 27626290148 + ... + 27626290155.

It is an arithmetic number, because the mean of its divisors is an integer number (64461343688).

Almost surely, 2^221010321212 is an apocalyptic number.

It is an amenable number.

221010321212 is a deficient number, since it is larger than the sum of its proper divisors (165757740916).

221010321212 is a wasteful number, since it uses less digits than its factorization.

221010321212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55252580307 (or 55252580305 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 221010321212 its reverse (212123010122), we get a palindrome (433133331334).

The spelling of 221010321212 in words is "two hundred twenty-one billion, ten million, three hundred twenty-one thousand, two hundred twelve".