121663603 has 2 divisors, whose sum is σ = 121663604. Its totient is φ = 121663602.

The previous prime is 121663571. The next prime is 121663627. The reversal of 121663603 is 306366121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 121663603 - 2⁵ = 121663571 is a prime.

It is not a weakly prime, because it can be changed into another prime (121663643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60831801 + 60831802.

It is an arithmetic number, because the mean of its divisors is an integer number (60831802).

Almost surely, 2^121663603 is an apocalyptic number.

121663603 is a deficient number, since it is larger than the sum of its proper divisors (1).

121663603 is an equidigital number, since it uses as much as digits as its factorization.

121663603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 121663603 is about 11030.1225287845. The cubic root of 121663603 is about 495.5112942963.

The spelling of 121663603 in words is "one hundred twenty-one million, six hundred sixty-three thousand, six hundred three".