33121331011 has 2 divisors, whose sum is σ = 33121331012. Its totient is φ = 33121331010.

The previous prime is 33121330997. The next prime is 33121331017. The reversal of 33121331011 is 11013312133.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 33121331011 - 2¹⁹ = 33120806723 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 33121331011.

It is not a weakly prime, because it can be changed into another prime (33121331017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16560665505 + 16560665506.

It is an arithmetic number, because the mean of its divisors is an integer number (16560665506).

Almost surely, 2^33121331011 is an apocalyptic number.

33121331011 is a deficient number, since it is larger than the sum of its proper divisors (1).

33121331011 is an equidigital number, since it uses as much as digits as its factorization.

33121331011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 162, while the sum is 19.

Adding to 33121331011 its reverse (11013312133), we get a palindrome (44134643144).

The spelling of 33121331011 in words is "thirty-three billion, one hundred twenty-one million, three hundred thirty-one thousand, eleven".