21232120011323 has 16 divisors (see below), whose sum is σ = 23075522537760. Its totient is φ = 19418746761216.

The previous prime is 21232120011293. The next prime is 21232120011331. The reversal of 21232120011323 is 32311002123212.

It is a cyclic number.

It is not a de Polignac number, because 21232120011323 - 2⁶ = 21232120011259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21232120011523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 135410936 + ... + 135567642.

It is an arithmetic number, because the mean of its divisors is an integer number (1442220158610).

Almost surely, 2^{21232120011323} is an apocalyptic number.

21232120011323 is a deficient number, since it is larger than the sum of its proper divisors (1843402526437).

21232120011323 is a wasteful number, since it uses less digits than its factorization.

21232120011323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252446.

The product of its (nonzero) digits is 864, while the sum is 23.

Adding to 21232120011323 its reverse (32311002123212), we get a palindrome (53543122134535).

The spelling of 21232120011323 in words is "twenty-one trillion, two hundred thirty-two billion, one hundred twenty million, eleven thousand, three hundred twenty-three".