121816668150 has 96 divisors (see below), whose sum is σ = 335834755200. Its totient is φ = 32468752800.

The previous prime is 121816668143. The next prime is 121816668151. The reversal of 121816668150 is 51866618121.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121816668096 and 121816668105.

It is a congruent number.

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 47 ways as a sum of consecutive naturals, for example, 2920945 + ... + 2962355.

It is an arithmetic number, because the mean of its divisors is an integer number (3498278700).

Almost surely, 2^121816668150 is an apocalyptic number.

121816668150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 121816668150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (167917377600).

121816668150 is an abundant number, since it is smaller than the sum of its proper divisors (214018087050).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121816668150 is a wasteful number, since it uses less digits than its factorization.

121816668150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43611 (or 43600 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The spelling of 121816668150 in words is "one hundred twenty-one billion, eight hundred sixteen million, six hundred sixty-eight thousand, one hundred fifty".