21114444331 has 2 divisors, whose sum is σ = 21114444332. Its totient is φ = 21114444330.

The previous prime is 21114444319. The next prime is 21114444341. The reversal of 21114444331 is 13344441112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21114444331 - 2¹³ = 21114436139 is a prime.

It is a super-2 number, since 2×21114444331² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21114444331.

It is not a weakly prime, because it can be changed into another prime (21114444341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10557222165 + 10557222166.

It is an arithmetic number, because the mean of its divisors is an integer number (10557222166).

Almost surely, 2^21114444331 is an apocalyptic number.

21114444331 is a deficient number, since it is larger than the sum of its proper divisors (1).

21114444331 is an equidigital number, since it uses as much as digits as its factorization.

21114444331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 28.

Adding to 21114444331 its reverse (13344441112), we get a palindrome (34458885443).

The spelling of 21114444331 in words is "twenty-one billion, one hundred fourteen million, four hundred forty-four thousand, three hundred thirty-one".