121817150 has 96 divisors (see below), whose sum is σ = 286106688. Its totient is φ = 37555200.

The previous prime is 121817149. The next prime is 121817167. The reversal of 121817150 is 51718121.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 186224 + ... + 186876.

It is an arithmetic number, because the mean of its divisors is an integer number (2980278).

Almost surely, 2^121817150 is an apocalyptic number.

121817150 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121817150 is an abundant number, since it is smaller than the sum of its proper divisors (164289538).

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

121817150 is a wasteful number, since it uses less digits than its factorization.

121817150 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726 (or 721 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 26.

The square root of 121817150 is about 11037.0806828618. The cubic root of 121817150 is about 495.7196619745.

The spelling of 121817150 in words is "one hundred twenty-one million, eight hundred seventeen thousand, one hundred fifty".