21022112207 has 2 divisors, whose sum is σ = 21022112208. Its totient is φ = 21022112206.

The previous prime is 21022112197. The next prime is 21022112213. The reversal of 21022112207 is 70221122012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21022112207 - 2⁶ = 21022112143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022112227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511056103 + 10511056104.

It is an arithmetic number, because the mean of its divisors is an integer number (10511056104).

Almost surely, 2^21022112207 is an apocalyptic number.

21022112207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022112207 is an equidigital number, since it uses as much as digits as its factorization.

21022112207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 224, while the sum is 20.

Adding to 21022112207 its reverse (70221122012), we get a palindrome (91243234219).

The spelling of 21022112207 in words is "twenty-one billion, twenty-two million, one hundred twelve thousand, two hundred seven".