21222331307 has 2 divisors, whose sum is σ = 21222331308. Its totient is φ = 21222331306.

The previous prime is 21222331301. The next prime is 21222331343. The reversal of 21222331307 is 70313322212.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21222331307 - 2⁶ = 21222331243 is a prime.

It is a super-2 number, since 2×21222331307² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21222331301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10611165653 + 10611165654.

It is an arithmetic number, because the mean of its divisors is an integer number (10611165654).

Almost surely, 2^21222331307 is an apocalyptic number.

21222331307 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222331307 is an equidigital number, since it uses as much as digits as its factorization.

21222331307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3024, while the sum is 26.

Adding to 21222331307 its reverse (70313322212), we get a palindrome (91535653519).

The spelling of 21222331307 in words is "twenty-one billion, two hundred twenty-two million, three hundred thirty-one thousand, three hundred seven".