21010023311 has 2 divisors, whose sum is σ = 21010023312. Its totient is φ = 21010023310.

The previous prime is 21010023301. The next prime is 21010023329. The reversal of 21010023311 is 11332001012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21010023311 - 2⁶ = 21010023247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21010023301) 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, 10505011655 + 10505011656.

It is an arithmetic number, because the mean of its divisors is an integer number (10505011656).

Almost surely, 2^21010023311 is an apocalyptic number.

21010023311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21010023311 is an equidigital number, since it uses as much as digits as its factorization.

21010023311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

Adding to 21010023311 its reverse (11332001012), we get a palindrome (32342024323).

The spelling of 21010023311 in words is "twenty-one billion, ten million, twenty-three thousand, three hundred eleven".