121765400033 has 2 divisors, whose sum is σ = 121765400034. Its totient is φ = 121765400032.

The previous prime is 121765400017. The next prime is 121765400041. The reversal of 121765400033 is 330004567121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 105087485584 + 16677914449 = 324172^2 + 129143^2 .

It is a cyclic number.

It is not a de Polignac number, because 121765400033 - 2⁴ = 121765400017 is a prime.

It is not a weakly prime, because it can be changed into another prime (121765400633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60882700016 + 60882700017.

It is an arithmetic number, because the mean of its divisors is an integer number (60882700017).

Almost surely, 2^121765400033 is an apocalyptic number.

It is an amenable number.

121765400033 is a deficient number, since it is larger than the sum of its proper divisors (1).

121765400033 is an equidigital number, since it uses as much as digits as its factorization.

121765400033 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 32.

Adding to 121765400033 its reverse (330004567121), we get a palindrome (451769967154).

The spelling of 121765400033 in words is "one hundred twenty-one billion, seven hundred sixty-five million, four hundred thousand, thirty-three".