21332112220123 has 4 divisors (see below), whose sum is σ = 21852407640168. Its totient is φ = 20811816800080.

The previous prime is 21332112220121. The next prime is 21332112220267. The reversal of 21332112220123 is 32102221123312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21332112220123 - 2¹ = 21332112220121 is a prime.

It is a super-2 number, since 2×21332112220123² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21332112220121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260147709961 + ... + 260147710042.

It is an arithmetic number, because the mean of its divisors is an integer number (5463101910042).

Almost surely, 2^{21332112220123} is an apocalyptic number.

21332112220123 is a deficient number, since it is larger than the sum of its proper divisors (520295420045).

21332112220123 is an equidigital number, since it uses as much as digits as its factorization.

21332112220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520295420044.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 21332112220123 its reverse (32102221123312), we get a palindrome (53434333343435).

The spelling of 21332112220123 in words is "twenty-one trillion, three hundred thirty-two billion, one hundred twelve million, two hundred twenty thousand, one hundred twenty-three".