21120111302223 has 8 divisors (see below), whose sum is σ = 28921233495088. Its totient is φ = 13699531655424.

The previous prime is 21120111302189. The next prime is 21120111302263. The reversal of 21120111302223 is 32220311102112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21120111302223 - 2²² = 21120107107919 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 21120111302223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21120111302263) 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, 95135636386 + ... + 95135636607.

It is an arithmetic number, because the mean of its divisors is an integer number (3615154186886).

Almost surely, 2^{21120111302223} is an apocalyptic number.

21120111302223 is a deficient number, since it is larger than the sum of its proper divisors (7801122192865).

21120111302223 is a wasteful number, since it uses less digits than its factorization.

21120111302223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 190271273033.

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 21120111302223 its reverse (32220311102112), we get a palindrome (53340422404335).

The spelling of 21120111302223 in words is "twenty-one trillion, one hundred twenty billion, one hundred eleven million, three hundred two thousand, two hundred twenty-three".