21111230323 has 8 divisors (see below), whose sum is σ = 21460942880. Its totient is φ = 20761634880.

The previous prime is 21111230291. The next prime is 21111230339. The reversal of 21111230323 is 32303211112.

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 21111230323 - 2⁵ = 21111230291 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21111230323.

It is not an unprimeable number, because it can be changed into a prime (21111233323) 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, 381511 + ... + 433327.

It is an arithmetic number, because the mean of its divisors is an integer number (2682617860).

Almost surely, 2^21111230323 is an apocalyptic number.

21111230323 is a deficient number, since it is larger than the sum of its proper divisors (349712557).

21111230323 is an equidigital number, since it uses as much as digits as its factorization.

21111230323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58557.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 21111230323 its reverse (32303211112), we get a palindrome (53414441435).

The spelling of 21111230323 in words is "twenty-one billion, one hundred eleven million, two hundred thirty thousand, three hundred twenty-three".