21110220331323 has 4 divisors (see below), whose sum is σ = 28146960441768. Its totient is φ = 14073480220880.

The previous prime is 21110220331303. The next prime is 21110220331379. The reversal of 21110220331323 is 32313302201112.

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 21110220331323 - 2¹⁰ = 21110220330299 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21110220331293 and 21110220331302.

It is not an unprimeable number, because it can be changed into a prime (21110220331303) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3518370055218 + ... + 3518370055223.

It is an arithmetic number, because the mean of its divisors is an integer number (7036740110442).

Almost surely, 2^{21110220331323} is an apocalyptic number.

21110220331323 is a deficient number, since it is larger than the sum of its proper divisors (7036740110445).

21110220331323 is an equidigital number, since it uses as much as digits as its factorization.

21110220331323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7036740110444.

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

Adding to 21110220331323 its reverse (32313302201112), we get a palindrome (53423522532435).

The spelling of 21110220331323 in words is "twenty-one trillion, one hundred ten billion, two hundred twenty million, three hundred thirty-one thousand, three hundred twenty-three".