33300010721 has 2 divisors, whose sum is σ = 33300010722. Its totient is φ = 33300010720.

The previous prime is 33300010687. The next prime is 33300010739. The reversal of 33300010721 is 12701000333.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24566173696 + 8733837025 = 156736^2 + 93455^2 .

It is a cyclic number.

It is not a de Polignac number, because 33300010721 - 2¹⁰ = 33300009697 is a prime.

It is a super-2 number, since 2×33300010721² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33300010693 and 33300010702.

It is not a weakly prime, because it can be changed into another prime (33300010741) 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 as a sum of consecutive naturals, namely, 16650005360 + 16650005361.

It is an arithmetic number, because the mean of its divisors is an integer number (16650005361).

Almost surely, 2^33300010721 is an apocalyptic number.

It is an amenable number.

33300010721 is a deficient number, since it is larger than the sum of its proper divisors (1).

33300010721 is an equidigital number, since it uses as much as digits as its factorization.

33300010721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 20.

The spelling of 33300010721 in words is "thirty-three billion, three hundred million, ten thousand, seven hundred twenty-one".