21010222323 has 24 divisors (see below), whose sum is σ = 30914069472. Its totient is φ = 13748007168.

The previous prime is 21010222309. The next prime is 21010222391. The reversal of 21010222323 is 32322201012.

It is not a de Polignac number, because 21010222323 - 2⁴ = 21010222307 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21010222296 and 21010222305.

It is not an unprimeable number, because it can be changed into a prime (21010222523) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4465 + ... + 205037.

It is an arithmetic number, because the mean of its divisors is an integer number (1288086228).

Almost surely, 2^21010222323 is an apocalyptic number.

21010222323 is a deficient number, since it is larger than the sum of its proper divisors (9903847149).

21010222323 is a wasteful number, since it uses less digits than its factorization.

21010222323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200795 (or 200792 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21010222323 its reverse (32322201012), we get a palindrome (53332423335).

The spelling of 21010222323 in words is "twenty-one billion, ten million, two hundred twenty-two thousand, three hundred twenty-three".