33320013121 has 2 divisors, whose sum is σ = 33320013122. Its totient is φ = 33320013120.

The previous prime is 33320013071. The next prime is 33320013137. The reversal of 33320013121 is 12131002333.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27284432400 + 6035580721 = 165180^2 + 77689^2 .

It is a cyclic number.

It is not a de Polignac number, because 33320013121 - 2⁷ = 33320012993 is a prime.

It is a super-2 number, since 2×33320013121² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (33320013151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16660006560 + 16660006561.

It is an arithmetic number, because the mean of its divisors is an integer number (16660006561).

Almost surely, 2^33320013121 is an apocalyptic number.

It is an amenable number.

33320013121 is a deficient number, since it is larger than the sum of its proper divisors (1).

33320013121 is an equidigital number, since it uses as much as digits as its factorization.

33320013121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 324, while the sum is 19.

Adding to 33320013121 its reverse (12131002333), we get a palindrome (45451015454).

The spelling of 33320013121 in words is "thirty-three billion, three hundred twenty million, thirteen thousand, one hundred twenty-one".