21323111222023 has 32 divisors (see below), whose sum is σ = 24442363116864. Its totient is φ = 18427396012032.

The previous prime is 21323111221981. The next prime is 21323111222033. The reversal of 21323111222023 is 32022211132312.

It is a de Polignac number, because none of the positive numbers 2^k-21323111222023 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21323111222033) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 234488361 + ... + 234579277.

It is an arithmetic number, because the mean of its divisors is an integer number (763823847402).

Almost surely, 2^{21323111222023} is an apocalyptic number.

21323111222023 is a deficient number, since it is larger than the sum of its proper divisors (3119251894841).

21323111222023 is a wasteful number, since it uses less digits than its factorization.

21323111222023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96531.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21323111222023 its reverse (32022211132312), we get a palindrome (53345322354335).

The spelling of 21323111222023 in words is "twenty-one trillion, three hundred twenty-three billion, one hundred eleven million, two hundred twenty-two thousand, twenty-three".