21220242033 has 16 divisors (see below), whose sum is σ = 28577188800. Its totient is φ = 14005238976.

The previous prime is 21220242019. The next prime is 21220242049. The reversal of 21220242033 is 33024202212.

It is not a de Polignac number, because 21220242033 - 2⁶ = 21220241969 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21220242013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 475891 + ... + 518567.

It is an arithmetic number, because the mean of its divisors is an integer number (1786074300).

Almost surely, 2^21220242033 is an apocalyptic number.

It is an amenable number.

21220242033 is a deficient number, since it is larger than the sum of its proper divisors (7356946767).

21220242033 is a wasteful number, since it uses less digits than its factorization.

21220242033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44336.

The product of its (nonzero) digits is 1152, while the sum is 21.

Adding to 21220242033 its reverse (33024202212), we get a palindrome (54244444245).

The spelling of 21220242033 in words is "twenty-one billion, two hundred twenty million, two hundred forty-two thousand, thirty-three".