21222562469 has 2 divisors, whose sum is σ = 21222562470. Its totient is φ = 21222562468.

The previous prime is 21222562463. The next prime is 21222562477. The reversal of 21222562469 is 96426522212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20545782244 + 676780225 = 143338^2 + 26015^2 .

It is a cyclic number.

It is not a de Polignac number, because 21222562469 - 2²⁰ = 21221513893 is a prime.

It is a super-2 number, since 2×21222562469² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21222562463) 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, 10611281234 + 10611281235.

It is an arithmetic number, because the mean of its divisors is an integer number (10611281235).

Almost surely, 2^21222562469 is an apocalyptic number.

It is an amenable number.

21222562469 is a deficient number, since it is larger than the sum of its proper divisors (1).

21222562469 is an equidigital number, since it uses as much as digits as its factorization.

21222562469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 41.

The spelling of 21222562469 in words is "twenty-one billion, two hundred twenty-two million, five hundred sixty-two thousand, four hundred sixty-nine".