121633663 has 2 divisors, whose sum is σ = 121633664. Its totient is φ = 121633662.

The previous prime is 121633661. The next prime is 121633667. The reversal of 121633663 is 366336121.

It is a weak prime.

It is an emirp because it is prime and its reverse (366336121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121633663 - 2¹ = 121633661 is a prime.

Together with 121633661, 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 (121633661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60816831 + 60816832.

It is an arithmetic number, because the mean of its divisors is an integer number (60816832).

Almost surely, 2^121633663 is an apocalyptic number.

121633663 is a deficient number, since it is larger than the sum of its proper divisors (1).

121633663 is an equidigital number, since it uses as much as digits as its factorization.

121633663 is an odious number, because the sum of its binary digits is odd.

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

The square root of 121633663 is about 11028.7652527380. The cubic root of 121633663 is about 495.4706444364.

Adding to 121633663 its reverse (366336121), we get a palindrome (487969784).

The spelling of 121633663 in words is "one hundred twenty-one million, six hundred thirty-three thousand, six hundred sixty-three".