33122133661 has 2 divisors, whose sum is σ = 33122133662. Its totient is φ = 33122133660.

The previous prime is 33122133659. The next prime is 33122133673. The reversal of 33122133661 is 16633122133.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31860108036 + 1262025625 = 178494^2 + 35525^2 .

It is a cyclic number.

It is not a de Polignac number, because 33122133661 - 2¹ = 33122133659 is a prime.

Together with 33122133659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33122133691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16561066830 + 16561066831.

It is an arithmetic number, because the mean of its divisors is an integer number (16561066831).

Almost surely, 2^33122133661 is an apocalyptic number.

It is an amenable number.

33122133661 is a deficient number, since it is larger than the sum of its proper divisors (1).

33122133661 is an equidigital number, since it uses as much as digits as its factorization.

33122133661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 31.

Adding to 33122133661 its reverse (16633122133), we get a palindrome (49755255794).

The spelling of 33122133661 in words is "thirty-three billion, one hundred twenty-two million, one hundred thirty-three thousand, six hundred sixty-one".