21122201033 has 4 divisors (see below), whose sum is σ = 21188832900. Its totient is φ = 21055569168.

The previous prime is 21122201027. The next prime is 21122201057. The reversal of 21122201033 is 33010222112.

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 556346569 + 20565854464 = 23587^2 + 143408^2 .

It is a cyclic number.

It is not a de Polignac number, because 21122201033 - 2¹² = 21122196937 is a prime.

It is a super-2 number, since 2×21122201033² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21122201833) 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, 33315458 + ... + 33316091.

It is an arithmetic number, because the mean of its divisors is an integer number (5297208225).

Almost surely, 2^21122201033 is an apocalyptic number.

It is an amenable number.

21122201033 is a deficient number, since it is larger than the sum of its proper divisors (66631867).

21122201033 is an equidigital number, since it uses as much as digits as its factorization.

21122201033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66631866.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21122201033 its reverse (33010222112), we get a palindrome (54132423145).

The spelling of 21122201033 in words is "twenty-one billion, one hundred twenty-two million, two hundred one thousand, thirty-three".