221221201010207 has 2 divisors, whose sum is σ = 221221201010208. Its totient is φ = 221221201010206.

The previous prime is 221221201010197. The next prime is 221221201010237. The reversal of 221221201010207 is 702010102122122.

221221201010207 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 221221201010207 - 2¹² = 221221201006111 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221221201010237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110610600505103 + 110610600505104.

It is an arithmetic number, because the mean of its divisors is an integer number (110610600505104).

Almost surely, 2^{221221201010207} is an apocalyptic number.

221221201010207 is a deficient number, since it is larger than the sum of its proper divisors (1).

221221201010207 is an equidigital number, since it uses as much as digits as its factorization.

221221201010207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 448, while the sum is 23.

Adding to 221221201010207 its reverse (702010102122122), we get a palindrome (923231303132329).

The spelling of 221221201010207 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred one million, ten thousand, two hundred seven".