33121330997 has 2 divisors, whose sum is σ = 33121330998. Its totient is φ = 33121330996.

The previous prime is 33121330933. The next prime is 33121331011. The reversal of 33121330997 is 79903312133.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23467482481 + 9653848516 = 153191^2 + 98254^2 .

It is a cyclic number.

It is not a de Polignac number, because 33121330997 - 2⁶ = 33121330933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33121330597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16560665498 + 16560665499.

It is an arithmetic number, because the mean of its divisors is an integer number (16560665499).

Almost surely, 2^33121330997 is an apocalyptic number.

It is an amenable number.

33121330997 is a deficient number, since it is larger than the sum of its proper divisors (1).

33121330997 is an equidigital number, since it uses as much as digits as its factorization.

33121330997 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 91854, while the sum is 41.

The spelling of 33121330997 in words is "thirty-three billion, one hundred twenty-one million, three hundred thirty thousand, nine hundred ninety-seven".