121385055511172 has 12 divisors (see below), whose sum is σ = 212785727637840. Its totient is φ = 60589133328936.

The previous prime is 121385055511127. The next prime is 121385055511177. The reversal of 121385055511172 is 271115550583121.

It is not an unprimeable number, because it can be changed into a prime (121385055511177) 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, 25848604022 + ... + 25848608717.

It is an arithmetic number, because the mean of its divisors is an integer number (17732143969820).

Almost surely, 2^{121385055511172} is an apocalyptic number.

It is an amenable number.

121385055511172 is a deficient number, since it is larger than the sum of its proper divisors (91400672126668).

121385055511172 is a wasteful number, since it uses less digits than its factorization.

121385055511172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51697213330 (or 51697213328 counting only the distinct ones).

The product of its (nonzero) digits is 420000, while the sum is 47.

The spelling of 121385055511172 in words is "one hundred twenty-one trillion, three hundred eighty-five billion, fifty-five million, five hundred eleven thousand, one hundred seventy-two".