21022100212207 has 2 divisors, whose sum is σ = 21022100212208. Its totient is φ = 21022100212206.

The previous prime is 21022100212133. The next prime is 21022100212229. The reversal of 21022100212207 is 70221200122012.

It is an a-pointer prime, because the next prime (21022100212229) can be obtained adding 21022100212207 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21022100212207 - 2¹⁵ = 21022100179439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022100212507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511050106103 + 10511050106104.

It is an arithmetic number, because the mean of its divisors is an integer number (10511050106104).

Almost surely, 2^{21022100212207} is an apocalyptic number.

21022100212207 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022100212207 is an equidigital number, since it uses as much as digits as its factorization.

21022100212207 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 21022100212207 its reverse (70221200122012), we get a palindrome (91243300334219).

The spelling of 21022100212207 in words is "twenty-one trillion, twenty-two billion, one hundred million, two hundred twelve thousand, two hundred seven".