121816668153 has 32 divisors (see below), whose sum is σ = 178247900160. Its totient is φ = 73729656000.

The previous prime is 121816668151. The next prime is 121816668161. The reversal of 121816668153 is 351866618121.

It is not a de Polignac number, because 121816668153 - 2¹ = 121816668151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121816668151) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 338973 + ... + 598778.

It is an arithmetic number, because the mean of its divisors is an integer number (5570246880).

Almost surely, 2^121816668153 is an apocalyptic number.

It is an amenable number.

121816668153 is a deficient number, since it is larger than the sum of its proper divisors (56431232007).

121816668153 is a wasteful number, since it uses less digits than its factorization.

121816668153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 937869.

The product of its digits is 414720, while the sum is 48.

The spelling of 121816668153 in words is "one hundred twenty-one billion, eight hundred sixteen million, six hundred sixty-eight thousand, one hundred fifty-three".