33042712421 has 2 divisors, whose sum is σ = 33042712422. Its totient is φ = 33042712420.

The previous prime is 33042712411. The next prime is 33042712429. The reversal of 33042712421 is 12421724033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19421488321 + 13621224100 = 139361^2 + 116710^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33042712421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33042712429) 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 as a sum of consecutive naturals, namely, 16521356210 + 16521356211.

It is an arithmetic number, because the mean of its divisors is an integer number (16521356211).

Almost surely, 2^33042712421 is an apocalyptic number.

It is an amenable number.

33042712421 is a deficient number, since it is larger than the sum of its proper divisors (1).

33042712421 is an equidigital number, since it uses as much as digits as its factorization.

33042712421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 29.

The spelling of 33042712421 in words is "thirty-three billion, forty-two million, seven hundred twelve thousand, four hundred twenty-one".