221012212207 has 2 divisors, whose sum is σ = 221012212208. Its totient is φ = 221012212206.

The previous prime is 221012212193. The next prime is 221012212277. The reversal of 221012212207 is 702212210122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221012212207 - 2⁷ = 221012212079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221012212277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110506106103 + 110506106104.

It is an arithmetic number, because the mean of its divisors is an integer number (110506106104).

Almost surely, 2^221012212207 is an apocalyptic number.

221012212207 is a deficient number, since it is larger than the sum of its proper divisors (1).

221012212207 is an equidigital number, since it uses as much as digits as its factorization.

221012212207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 448, while the sum is 22.

Adding to 221012212207 its reverse (702212210122), we get a palindrome (923224422329).

The spelling of 221012212207 in words is "two hundred twenty-one billion, twelve million, two hundred twelve thousand, two hundred seven".