21401444011 has 2 divisors, whose sum is σ = 21401444012. Its totient is φ = 21401444010.

The previous prime is 21401443969. The next prime is 21401444033. The reversal of 21401444011 is 11044410412.

It is an a-pointer prime, because the next prime (21401444033) can be obtained adding 21401444011 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21401444011 - 2¹⁹ = 21400919723 is a prime.

It is not a weakly prime, because it can be changed into another prime (21401441011) 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, 10700722005 + 10700722006.

It is an arithmetic number, because the mean of its divisors is an integer number (10700722006).

Almost surely, 2^21401444011 is an apocalyptic number.

21401444011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21401444011 is an equidigital number, since it uses as much as digits as its factorization.

21401444011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 22.

Adding to 21401444011 its reverse (11044410412), we get a palindrome (32445854423).

The spelling of 21401444011 in words is "twenty-one billion, four hundred one million, four hundred forty-four thousand, eleven".