21011033323 has 8 divisors (see below), whose sum is σ = 24465678048. Its totient is φ = 17669655744.

The previous prime is 21011033297. The next prime is 21011033341. The reversal of 21011033323 is 32333011012.

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 21011033323 - 2⁵ = 21011033291 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 21011033323.

It is not an unprimeable number, because it can be changed into a prime (21011033353) 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, 28316386 + ... + 28317127.

It is an arithmetic number, because the mean of its divisors is an integer number (3058209756).

Almost surely, 2^21011033323 is an apocalyptic number.

21011033323 is a deficient number, since it is larger than the sum of its proper divisors (3454644725).

21011033323 is an equidigital number, since it uses as much as digits as its factorization.

21011033323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56633573.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 21011033323 its reverse (32333011012), we get a palindrome (53344044335).

The spelling of 21011033323 in words is "twenty-one billion, eleven million, thirty-three thousand, three hundred twenty-three".