21230422267 has 2 divisors, whose sum is σ = 21230422268. Its totient is φ = 21230422266.

The previous prime is 21230422253. The next prime is 21230422271. The reversal of 21230422267 is 76222403212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21230422267 - 2²³ = 21222033659 is a prime.

It is not a weakly prime, because it can be changed into another prime (21230422867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10615211133 + 10615211134.

It is an arithmetic number, because the mean of its divisors is an integer number (10615211134).

Almost surely, 2^21230422267 is an apocalyptic number.

21230422267 is a deficient number, since it is larger than the sum of its proper divisors (1).

21230422267 is an equidigital number, since it uses as much as digits as its factorization.

21230422267 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 31.

Adding to 21230422267 its reverse (76222403212), we get a palindrome (97452825479).

The spelling of 21230422267 in words is "twenty-one billion, two hundred thirty million, four hundred twenty-two thousand, two hundred sixty-seven".