21022401323 has 8 divisors (see below), whose sum is σ = 26209747200. Its totient is φ = 16381091880.

The previous prime is 21022401311. The next prime is 21022401329. The reversal of 21022401323 is 32310422012.

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 21022401323 - 2⁸ = 21022401067 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21022401295 and 21022401304.

It is not an unprimeable number, because it can be changed into a prime (21022401329) 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, 136509023 + ... + 136509176.

It is an arithmetic number, because the mean of its divisors is an integer number (3276218400).

Almost surely, 2^21022401323 is an apocalyptic number.

21022401323 is a deficient number, since it is larger than the sum of its proper divisors (5187345877).

21022401323 is a wasteful number, since it uses less digits than its factorization.

21022401323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273018217.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21022401323 its reverse (32310422012), we get a palindrome (53332823335).

The spelling of 21022401323 in words is "twenty-one billion, twenty-two million, four hundred one thousand, three hundred twenty-three".