21232200211121 has 4 divisors (see below), whose sum is σ = 21311130323700. Its totient is φ = 21153270098544.

The previous prime is 21232200211111. The next prime is 21232200211133. The reversal of 21232200211121 is 12111200223212.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1107429999025 + 20124770212096 = 1052345^2 + 4486064^2 .

It is a cyclic number.

It is not a de Polignac number, because 21232200211121 - 2¹⁸ = 21232199948977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21232200211093 and 21232200211102.

It is not an unprimeable number, because it can be changed into a prime (21232200211111) 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, 39465055886 + ... + 39465056423.

It is an arithmetic number, because the mean of its divisors is an integer number (5327782580925).

Almost surely, 2^{21232200211121} is an apocalyptic number.

It is an amenable number.

21232200211121 is a deficient number, since it is larger than the sum of its proper divisors (78930112579).

21232200211121 is an equidigital number, since it uses as much as digits as its factorization.

21232200211121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78930112578.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 21232200211121 its reverse (12111200223212), we get a palindrome (33343400434333).

The spelling of 21232200211121 in words is "twenty-one trillion, two hundred thirty-two billion, two hundred million, two hundred eleven thousand, one hundred twenty-one".