33030111212221 has 4 divisors (see below), whose sum is σ = 33030127620892. Its totient is φ = 33030094803552.

The previous prime is 33030111212173. The next prime is 33030111212227. The reversal of 33030111212221 is 12221211103033.

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 16189437432100 + 16840673780121 = 4023610^2 + 4103739^2 .

It is a cyclic number.

It is not a de Polignac number, because 33030111212221 - 2³³ = 33021521277629 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33030111212192 and 33030111212201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33030111212227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4680330 + ... + 9379003.

It is an arithmetic number, because the mean of its divisors is an integer number (8257531905223).

Almost surely, 2^{33030111212221} is an apocalyptic number.

It is an amenable number.

33030111212221 is a deficient number, since it is larger than the sum of its proper divisors (16408671).

33030111212221 is a wasteful number, since it uses less digits than its factorization.

33030111212221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16408670.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 33030111212221 its reverse (12221211103033), we get a palindrome (45251322315254).

The spelling of 33030111212221 in words is "thirty-three trillion, thirty billion, one hundred eleven million, two hundred twelve thousand, two hundred twenty-one".