33520240121 has 4 divisors (see below), whose sum is σ = 34676110500. Its totient is φ = 32364369744.

The previous prime is 33520240099. The next prime is 33520240163. The reversal of 33520240121 is 12104202533.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12104202533 = 37 ⋅327140609.

It can be written as a sum of positive squares in 2 ways, for example, as 17065764496 + 16454475625 = 130636^2 + 128275^2 .

It is a cyclic number.

It is not a de Polignac number, because 33520240121 - 2¹⁰ = 33520239097 is a prime.

It is a super-2 number, since 2×33520240121² (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 (33520243121) 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, 577935146 + ... + 577935203.

It is an arithmetic number, because the mean of its divisors is an integer number (8669027625).

Almost surely, 2^33520240121 is an apocalyptic number.

It is an amenable number.

33520240121 is a deficient number, since it is larger than the sum of its proper divisors (1155870379).

33520240121 is a wasteful number, since it uses less digits than its factorization.

33520240121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155870378.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 33520240121 its reverse (12104202533), we get a palindrome (45624442654).

The spelling of 33520240121 in words is "thirty-three billion, five hundred twenty million, two hundred forty thousand, one hundred twenty-one".