21212202033 has 12 divisors (see below), whose sum is σ = 33425288208. Its totient is φ = 12855879960.

The previous prime is 21212201963. The next prime is 21212202041. The reversal of 21212202033 is 33020221212.

It is not a de Polignac number, because 21212202033 - 2¹³ = 21212193841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21212201997 and 21212202015.

It is not an unprimeable number, because it can be changed into a prime (21212202043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 107132235 + ... + 107132432.

It is an arithmetic number, because the mean of its divisors is an integer number (2785440684).

Almost surely, 2^21212202033 is an apocalyptic number.

It is an amenable number.

21212202033 is a deficient number, since it is larger than the sum of its proper divisors (12213086175).

21212202033 is a wasteful number, since it uses less digits than its factorization.

21212202033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214264684 (or 214264681 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21212202033 its reverse (33020221212), we get a palindrome (54232423245).

The spelling of 21212202033 in words is "twenty-one billion, two hundred twelve million, two hundred two thousand, thirty-three".