121616256381670 has 32 divisors (see below), whose sum is σ = 226343125794816. Its totient is φ = 46999703196000.

The previous prime is 121616256381649. The next prime is 121616256381707. The reversal of 121616256381670 is 76183652616121.

121616256381670 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (55) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322967106 + ... + 323343445.

It is an arithmetic number, because the mean of its divisors is an integer number (7073222681088).

Almost surely, 2^{121616256381670} is an apocalyptic number.

121616256381670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121616256381670 is a deficient number, since it is larger than the sum of its proper divisors (104726869413146).

121616256381670 is a wasteful number, since it uses less digits than its factorization.

121616256381670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 646311196.

The product of its (nonzero) digits is 4354560, while the sum is 55.

The spelling of 121616256381670 in words is "one hundred twenty-one trillion, six hundred sixteen billion, two hundred fifty-six million, three hundred eighty-one thousand, six hundred seventy".