21241112033 has 4 divisors (see below), whose sum is σ = 21815196180. Its totient is φ = 20667027888.

The previous prime is 21241112017. The next prime is 21241112069. The reversal of 21241112033 is 33021114212.

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 12384796369 + 8856315664 = 111287^2 + 94108^2 .

It is a cyclic number.

It is not a de Polignac number, because 21241112033 - 2⁴ = 21241112017 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21241111996 and 21241112014.

It is not an unprimeable number, because it can be changed into a prime (21241112003) 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, 287042018 + ... + 287042091.

It is an arithmetic number, because the mean of its divisors is an integer number (5453799045).

Almost surely, 2^21241112033 is an apocalyptic number.

It is an amenable number.

21241112033 is a deficient number, since it is larger than the sum of its proper divisors (574084147).

21241112033 is an equidigital number, since it uses as much as digits as its factorization.

21241112033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 574084146.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 21241112033 its reverse (33021114212), we get a palindrome (54262226245).

The spelling of 21241112033 in words is "twenty-one billion, two hundred forty-one million, one hundred twelve thousand, thirty-three".