21102023311 has 2 divisors, whose sum is σ = 21102023312. Its totient is φ = 21102023310.

The previous prime is 21102023287. The next prime is 21102023321. The reversal of 21102023311 is 11332020112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21102023311 - 2¹⁵ = 21101990543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21102023321) 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, 10551011655 + 10551011656.

It is an arithmetic number, because the mean of its divisors is an integer number (10551011656).

Almost surely, 2^21102023311 is an apocalyptic number.

21102023311 is a deficient number, since it is larger than the sum of its proper divisors (1).

21102023311 is an equidigital number, since it uses as much as digits as its factorization.

21102023311 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 21102023311 its reverse (11332020112), we get a palindrome (32434043423).

The spelling of 21102023311 in words is "twenty-one billion, one hundred two million, twenty-three thousand, three hundred eleven".