121416556611 has 16 divisors (see below), whose sum is σ = 186085165824. Its totient is φ = 68979841824.

The previous prime is 121416556561. The next prime is 121416556619. The reversal of 121416556611 is 116655614121.

It is not a de Polignac number, because 121416556611 - 2⁹ = 121416556099 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121416556611.

It is not an unprimeable number, because it can be changed into a prime (121416556619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16706601 + ... + 16713866.

It is an arithmetic number, because the mean of its divisors is an integer number (11630322864).

Almost surely, 2^121416556611 is an apocalyptic number.

121416556611 is a deficient number, since it is larger than the sum of its proper divisors (64668609213).

121416556611 is a wasteful number, since it uses less digits than its factorization.

121416556611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33420650.

The product of its digits is 43200, while the sum is 39.

The spelling of 121416556611 in words is "one hundred twenty-one billion, four hundred sixteen million, five hundred fifty-six thousand, six hundred eleven".