21001231202323 has 8 divisors (see below), whose sum is σ = 22868854304400. Its totient is φ = 19209837614688.

The previous prime is 21001231202317. The next prime is 21001231202353. The reversal of 21001231202323 is 32320213210012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21001231202323 - 2⁵ = 21001231202291 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21001231202294 and 21001231202303.

It is not an unprimeable number, because it can be changed into a prime (21001231202353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19057378036 + ... + 19057379137.

It is an arithmetic number, because the mean of its divisors is an integer number (2858606788050).

Almost surely, 2^{21001231202323} is an apocalyptic number.

21001231202323 is a deficient number, since it is larger than the sum of its proper divisors (1867623102077).

21001231202323 is a wasteful number, since it uses less digits than its factorization.

21001231202323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38114757221.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 21001231202323 its reverse (32320213210012), we get a palindrome (53321444412335).

The spelling of 21001231202323 in words is "twenty-one trillion, one billion, two hundred thirty-one million, two hundred two thousand, three hundred twenty-three".