121863500 has 48 divisors (see below), whose sum is σ = 290358432. Its totient is φ = 44312000.

The previous prime is 121863491. The next prime is 121863503. The reversal of 121863500 is 5368121.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 121863500.

It is not an unprimeable number, because it can be changed into a prime (121863503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5579 + ... + 16578.

It is an arithmetic number, because the mean of its divisors is an integer number (6049134).

Almost surely, 2^121863500 is an apocalyptic number.

121863500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121863500 is an abundant number, since it is smaller than the sum of its proper divisors (168494932).

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

121863500 is a wasteful number, since it uses less digits than its factorization.

121863500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22187 (or 22175 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 121863500 is about 11039.1802231869. The cubic root of 121863500 is about 495.7825258456.

The spelling of 121863500 in words is "one hundred twenty-one million, eight hundred sixty-three thousand, five hundred".