33021133121 has 4 divisors (see below), whose sum is σ = 33313355652. Its totient is φ = 32728910592.

The previous prime is 33021133027. The next prime is 33021133139. The reversal of 33021133121 is 12133112033.

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 1162810000 + 31858323121 = 34100^2 + 178489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33021133121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33021133093 and 33021133102.

It is not an unprimeable number, because it can be changed into a prime (33021132121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146111096 + ... + 146111321.

It is an arithmetic number, because the mean of its divisors is an integer number (8328338913).

Almost surely, 2^33021133121 is an apocalyptic number.

It is an amenable number.

33021133121 is a deficient number, since it is larger than the sum of its proper divisors (292222531).

33021133121 is a wasteful number, since it uses less digits than its factorization.

33021133121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 292222530.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 33021133121 its reverse (12133112033), we get a palindrome (45154245154).

The spelling of 33021133121 in words is "thirty-three billion, twenty-one million, one hundred thirty-three thousand, one hundred twenty-one".