121855950 has 36 divisors (see below), whose sum is σ = 327387528. Its totient is φ = 32494800.

The previous prime is 121855939. The next prime is 121855967. The reversal of 121855950 is 59558121.

It is a happy number.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 134946 + ... + 135845.

It is an arithmetic number, because the mean of its divisors is an integer number (9094098).

Almost surely, 2^121855950 is an apocalyptic number.

121855950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121855950 is an abundant number, since it is smaller than the sum of its proper divisors (205531578).

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

121855950 is a wasteful number, since it uses less digits than its factorization.

121855950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270809 (or 270801 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 36.

The square root of 121855950 is about 11038.8382540918. The cubic root of 121855950 is about 495.7722869708.

The spelling of 121855950 in words is "one hundred twenty-one million, eight hundred fifty-five thousand, nine hundred fifty".