33131302121 has 4 divisors (see below), whose sum is σ = 33131776212. Its totient is φ = 33130828032.

The previous prime is 33131302063. The next prime is 33131302133. The reversal of 33131302121 is 12120313133.

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 18923854096 + 14207448025 = 137564^2 + 119195^2 .

It is a cyclic number.

It is not a de Polignac number, because 33131302121 - 2¹⁰ = 33131301097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 33131302093 and 33131302102.

It is not an unprimeable number, because it can be changed into a prime (33131302151) 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, 109256 + ... + 279641.

It is an arithmetic number, because the mean of its divisors is an integer number (8282944053).

Almost surely, 2^33131302121 is an apocalyptic number.

It is an amenable number.

33131302121 is a deficient number, since it is larger than the sum of its proper divisors (474091).

33131302121 is an equidigital number, since it uses as much as digits as its factorization.

33131302121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474090.

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

Adding to 33131302121 its reverse (12120313133), we get a palindrome (45251615254).

The spelling of 33131302121 in words is "thirty-three billion, one hundred thirty-one million, three hundred two thousand, one hundred twenty-one".