21432422113 has 2 divisors, whose sum is σ = 21432422114. Its totient is φ = 21432422112.

The previous prime is 21432422111. The next prime is 21432422117. The reversal of 21432422113 is 31122423412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15981257889 + 5451164224 = 126417^2 + 73832^2 .

It is a cyclic number.

It is not a de Polignac number, because 21432422113 - 2¹ = 21432422111 is a prime.

It is a super-2 number, since 2×21432422113² (a number of 21 digits) contains 22 as substring.

Together with 21432422111, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (21432422111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716211056 + 10716211057.

It is an arithmetic number, because the mean of its divisors is an integer number (10716211057).

Almost surely, 2^21432422113 is an apocalyptic number.

It is an amenable number.

21432422113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21432422113 is an equidigital number, since it uses as much as digits as its factorization.

21432422113 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

Adding to 21432422113 its reverse (31122423412), we get a palindrome (52554845525).

The spelling of 21432422113 in words is "twenty-one billion, four hundred thirty-two million, four hundred twenty-two thousand, one hundred thirteen".