21002310011 has 2 divisors, whose sum is σ = 21002310012. Its totient is φ = 21002310010.

The previous prime is 21002309989. The next prime is 21002310031. The reversal of 21002310011 is 11001320012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21002310011 - 2³⁴ = 3822440827 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21002309974 and 21002310001.

It is not a weakly prime, because it can be changed into another prime (21002310031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501155005 + 10501155006.

It is an arithmetic number, because the mean of its divisors is an integer number (10501155006).

Almost surely, 2^21002310011 is an apocalyptic number.

21002310011 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002310011 is an equidigital number, since it uses as much as digits as its factorization.

21002310011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 21002310011 its reverse (11001320012), we get a palindrome (32003630023).

The spelling of 21002310011 in words is "twenty-one billion, two million, three hundred ten thousand, eleven".