121155863266 has 8 divisors (see below), whose sum is σ = 181735621200. Its totient is φ = 60577322868.

The previous prime is 121155863261. The next prime is 121155863299. The reversal of 121155863266 is 662368551121.

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

It is not an unprimeable number, because it can be changed into a prime (121155863261) 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 3 ways as a sum of consecutive naturals, for example, 8865 + ... + 492331.

It is an arithmetic number, because the mean of its divisors is an integer number (22716952650).

Almost surely, 2^121155863266 is an apocalyptic number.

121155863266 is a deficient number, since it is larger than the sum of its proper divisors (60579757934).

121155863266 is a wasteful number, since it uses less digits than its factorization.

121155863266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608768.

The product of its digits is 518400, while the sum is 46.

The spelling of 121155863266 in words is "one hundred twenty-one billion, one hundred fifty-five million, eight hundred sixty-three thousand, two hundred sixty-six".