33031112921 has 2 divisors, whose sum is σ = 33031112922. Its totient is φ = 33031112920.

The previous prime is 33031112911. The next prime is 33031112923. The reversal of 33031112921 is 12921113033.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30204702025 + 2826410896 = 173795^2 + 53164^2 .

It is a cyclic number.

It is not a de Polignac number, because 33031112921 - 2¹⁴ = 33031096537 is a prime.

It is a Sophie Germain prime.

Together with 33031112923, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (33031112923) 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, 16515556460 + 16515556461.

It is an arithmetic number, because the mean of its divisors is an integer number (16515556461).

Almost surely, 2^33031112921 is an apocalyptic number.

It is an amenable number.

33031112921 is a deficient number, since it is larger than the sum of its proper divisors (1).

33031112921 is an equidigital number, since it uses as much as digits as its factorization.

33031112921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 972, while the sum is 26.

Adding to 33031112921 its reverse (12921113033), we get a palindrome (45952225954).

The spelling of 33031112921 in words is "thirty-three billion, thirty-one million, one hundred twelve thousand, nine hundred twenty-one".