21111100443023 has 8 divisors (see below), whose sum is σ = 21133441357536. Its totient is φ = 21088767456000.

The previous prime is 21111100442987. The next prime is 21111100443109. The reversal of 21111100443023 is 32034400111112.

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 21111100443023 - 2⁸ = 21111100442767 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 21111100443023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21111100043023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3354590 + ... + 7312692.

It is an arithmetic number, because the mean of its divisors is an integer number (2641680169692).

Almost surely, 2^{21111100443023} is an apocalyptic number.

21111100443023 is a deficient number, since it is larger than the sum of its proper divisors (22340914513).

21111100443023 is a wasteful number, since it uses less digits than its factorization.

21111100443023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3963745.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21111100443023 its reverse (32034400111112), we get a palindrome (53145500554135).

The spelling of 21111100443023 in words is "twenty-one trillion, one hundred eleven billion, one hundred million, four hundred forty-three thousand, twenty-three".