21111323323 has 8 divisors (see below), whose sum is σ = 21305066816. Its totient is φ = 20918363400.

The previous prime is 21111323267. The next prime is 21111323341. The reversal of 21111323323 is 32332311112.

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 21111323323 - 2⁹ = 21111322811 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21111323294 and 21111323303.

It is not an unprimeable number, because it can be changed into a prime (21111323353) 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, 141693 + ... + 249598.

It is an arithmetic number, because the mean of its divisors is an integer number (2663133352).

Almost surely, 2^21111323323 is an apocalyptic number.

21111323323 is a deficient number, since it is larger than the sum of its proper divisors (193743493).

21111323323 is a wasteful number, since it uses less digits than its factorization.

21111323323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391785.

The product of its digits is 648, while the sum is 22.

Adding to 21111323323 its reverse (32332311112), we get a palindrome (53443634435).

The spelling of 21111323323 in words is "twenty-one billion, one hundred eleven million, three hundred twenty-three thousand, three hundred twenty-three".