121660500150 has 288 divisors, whose sum is σ = 391369013280. Its totient is φ = 27708791040.

The previous prime is 121660500127. The next prime is 121660500173. The reversal of 121660500150 is 51005066121.

It is a happy number.

121660500150 is a `hidden beast` number, since 1 + 2 + 1 + 6 + 6 + 0 + 500 + 150 = 666.

It is an interprime number because it is at equal distance from previous prime (121660500127) and next prime (121660500173).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 19378812 + ... + 19385088.

It is an arithmetic number, because the mean of its divisors is an integer number (1358920185).

Almost surely, 2^121660500150 is an apocalyptic number.

121660500150 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 121660500150, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (195684506640).

121660500150 is an abundant number, since it is smaller than the sum of its proper divisors (269708513130).

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

121660500150 is a wasteful number, since it uses less digits than its factorization.

121660500150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6605 (or 6587 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 121660500150 its reverse (51005066121), we get a palindrome (172665566271).

The spelling of 121660500150 in words is "one hundred twenty-one billion, six hundred sixty million, five hundred thousand, one hundred fifty".