121016663 has 4 divisors (see below), whose sum is σ = 123831048. Its totient is φ = 118202280.

The previous prime is 121016647. The next prime is 121016669. The reversal of 121016663 is 366610121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 366610121 = 883 ⋅415187.

It is a cyclic number.

It is not a de Polignac number, because 121016663 - 2⁴ = 121016647 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121016669) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1407128 + ... + 1407213.

It is an arithmetic number, because the mean of its divisors is an integer number (30957762).

Almost surely, 2^121016663 is an apocalyptic number.

121016663 is a deficient number, since it is larger than the sum of its proper divisors (2814385).

121016663 is an equidigital number, since it uses as much as digits as its factorization.

121016663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2814384.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 121016663 is about 11000.7573830169. The cubic root of 121016663 is about 494.6314475954.

Adding to 121016663 its reverse (366610121), we get a palindrome (487626784).

The spelling of 121016663 in words is "one hundred twenty-one million, sixteen thousand, six hundred sixty-three".