21110001111223 has 8 divisors (see below), whose sum is σ = 21488721762816. Its totient is φ = 20733541479000.

The previous prime is 21110001111193. The next prime is 21110001111239. The reversal of 21110001111223 is 32211110001112.

It is a happy number.

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 21110001111223 - 2¹³ = 21110001103031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21110001111197 and 21110001111206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21110001111253) 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, 565236003 + ... + 565273348.

It is an arithmetic number, because the mean of its divisors is an integer number (2686090220352).

Almost surely, 2^{21110001111223} is an apocalyptic number.

21110001111223 is a deficient number, since it is larger than the sum of its proper divisors (378720651593).

21110001111223 is a wasteful number, since it uses less digits than its factorization.

21110001111223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130509685.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 21110001111223 its reverse (32211110001112), we get a palindrome (53321111112335).

It can be divided in two parts, 2111000 and 1111223, that added together give a palindrome (3222223).

The spelling of 21110001111223 in words is "twenty-one trillion, one hundred ten billion, one million, one hundred eleven thousand, two hundred twenty-three".