221102111207 has 2 divisors, whose sum is σ = 221102111208. Its totient is φ = 221102111206.

The previous prime is 221102111173. The next prime is 221102111227. The reversal of 221102111207 is 702111201122.

It is a happy number.

It is an a-pointer prime, because the next prime (221102111227) can be obtained adding 221102111207 to its sum of digits (20).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 221102111207 - 2²⁶ = 221035002343 is a prime.

It is a super-2 number, since 2×221102111207² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221102111227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110551055603 + 110551055604.

It is an arithmetic number, because the mean of its divisors is an integer number (110551055604).

Almost surely, 2^221102111207 is an apocalyptic number.

221102111207 is a deficient number, since it is larger than the sum of its proper divisors (1).

221102111207 is an equidigital number, since it uses as much as digits as its factorization.

221102111207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 20.

Adding to 221102111207 its reverse (702111201122), we get a palindrome (923213312329).

The spelling of 221102111207 in words is "two hundred twenty-one billion, one hundred two million, one hundred eleven thousand, two hundred seven".