21323203203111 has 4 divisors (see below), whose sum is σ = 28430937604152. Its totient is φ = 14215468802072.

The previous prime is 21323203203077. The next prime is 21323203203151. The reversal of 21323203203111 is 11130230232312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21323203203111 - 2⁹ = 21323203202599 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323203203151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3553867200516 + ... + 3553867200521.

It is an arithmetic number, because the mean of its divisors is an integer number (7107734401038).

Almost surely, 2^{21323203203111} is an apocalyptic number.

21323203203111 is a deficient number, since it is larger than the sum of its proper divisors (7107734401041).

21323203203111 is an equidigital number, since it uses as much as digits as its factorization.

21323203203111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7107734401040.

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 21323203203111 its reverse (11130230232312), we get a palindrome (32453433435423).

The spelling of 21323203203111 in words is "twenty-one trillion, three hundred twenty-three billion, two hundred three million, two hundred three thousand, one hundred eleven".