121563611 has 8 divisors (see below), whose sum is σ = 134453424. Its totient is φ = 109179360.

The previous prime is 121563599. The next prime is 121563683. The reversal of 121563611 is 116365121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121563611 - 2¹⁰ = 121562587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121563011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 125885 + ... + 126846.

It is an arithmetic number, because the mean of its divisors is an integer number (16806678).

Almost surely, 2^121563611 is an apocalyptic number.

121563611 is a deficient number, since it is larger than the sum of its proper divisors (12889813).

121563611 is a wasteful number, since it uses less digits than its factorization.

121563611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252781.

The product of its digits is 1080, while the sum is 26.

The square root of 121563611 is about 11025.5889185113. The cubic root of 121563611 is about 495.3755080131.

The spelling of 121563611 in words is "one hundred twenty-one million, five hundred sixty-three thousand, six hundred eleven".