33213131121 has 4 divisors (see below), whose sum is σ = 44284174832. Its totient is φ = 22142087412.

The previous prime is 33213131113. The next prime is 33213131143. The reversal of 33213131121 is 12113131233.

It is a happy number.

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 33213131121 - 2³ = 33213131113 is a prime.

It is a super-2 number, since 2×33213131121² (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 (33213131101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5535521851 + ... + 5535521856.

It is an arithmetic number, because the mean of its divisors is an integer number (11071043708).

Almost surely, 2^33213131121 is an apocalyptic number.

It is an amenable number.

33213131121 is a deficient number, since it is larger than the sum of its proper divisors (11071043711).

33213131121 is a wasteful number, since it uses less digits than its factorization.

33213131121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11071043710.

The product of its digits is 324, while the sum is 21.

Adding to 33213131121 its reverse (12113131233), we get a palindrome (45326262354).

The spelling of 33213131121 in words is "thirty-three billion, two hundred thirteen million, one hundred thirty-one thousand, one hundred twenty-one".