33213221121 has 4 divisors (see below), whose sum is σ = 44284294832. Its totient is φ = 22142147412.

The previous prime is 33213221117. The next prime is 33213221179. The reversal of 33213221121 is 12112231233.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 33213221121 - 2² = 33213221117 is a prime.

It is a super-2 number, since 2×33213221121² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33213221221) 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 3 ways as a sum of consecutive naturals, for example, 5535536851 + ... + 5535536856.

It is an arithmetic number, because the mean of its divisors is an integer number (11071073708).

Almost surely, 2^33213221121 is an apocalyptic number.

It is an amenable number.

33213221121 is a deficient number, since it is larger than the sum of its proper divisors (11071073711).

33213221121 is a wasteful number, since it uses less digits than its factorization.

33213221121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11071073710.

The product of its digits is 432, while the sum is 21.

Adding to 33213221121 its reverse (12112231233), we get a palindrome (45325452354).

The spelling of 33213221121 in words is "thirty-three billion, two hundred thirteen million, two hundred twenty-one thousand, one hundred twenty-one".