121181603 has 2 divisors, whose sum is σ = 121181604. Its totient is φ = 121181602.

The previous prime is 121181591. The next prime is 121181659. The reversal of 121181603 is 306181121.

It is a weak prime.

It is an emirp because it is prime and its reverse (306181121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 121181603 - 2⁴ = 121181587 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (121181303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60590801 + 60590802.

It is an arithmetic number, because the mean of its divisors is an integer number (60590802).

Almost surely, 2^121181603 is an apocalyptic number.

121181603 is a deficient number, since it is larger than the sum of its proper divisors (1).

121181603 is an equidigital number, since it uses as much as digits as its factorization.

121181603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 121181603 is about 11008.2515868779. The cubic root of 121181603 is about 494.8560653511.

The spelling of 121181603 in words is "one hundred twenty-one million, one hundred eighty-one thousand, six hundred three".