33122111221 has 4 divisors (see below), whose sum is σ = 33124430700. Its totient is φ = 33119791744.

The previous prime is 33122111219. The next prime is 33122111233. The reversal of 33122111221 is 12211122133.

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 17325140625 + 15796970596 = 131625^2 + 125686^2 .

It is a cyclic number.

It is not a de Polignac number, because 33122111221 - 2¹ = 33122111219 is a prime.

It is a super-2 number, since 2×33122111221² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33122111021) 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, 1138186 + ... + 1166923.

It is an arithmetic number, because the mean of its divisors is an integer number (8281107675).

Almost surely, 2^33122111221 is an apocalyptic number.

It is an amenable number.

33122111221 is a deficient number, since it is larger than the sum of its proper divisors (2319479).

33122111221 is a wasteful number, since it uses less digits than its factorization.

33122111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2319478.

The product of its digits is 144, while the sum is 19.

Adding to 33122111221 its reverse (12211122133), we get a palindrome (45333233354).

The spelling of 33122111221 in words is "thirty-three billion, one hundred twenty-two million, one hundred eleven thousand, two hundred twenty-one".