21311003093 has 2 divisors, whose sum is σ = 21311003094. Its totient is φ = 21311003092.

The previous prime is 21311003069. The next prime is 21311003113. The reversal of 21311003093 is 39030011312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11194063204 + 10116939889 = 105802^2 + 100583^2 .

It is a cyclic number.

It is not a de Polignac number, because 21311003093 - 2¹⁴ = 21310986709 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21311003053) 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, 10655501546 + 10655501547.

It is an arithmetic number, because the mean of its divisors is an integer number (10655501547).

Almost surely, 2^21311003093 is an apocalyptic number.

It is an amenable number.

21311003093 is a deficient number, since it is larger than the sum of its proper divisors (1).

21311003093 is an equidigital number, since it uses as much as digits as its factorization.

21311003093 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 23.

The spelling of 21311003093 in words is "twenty-one billion, three hundred eleven million, three thousand, ninety-three".