121873550 has 24 divisors (see below), whose sum is σ = 236542896. Its totient is φ = 46629440.

The previous prime is 121873519. The next prime is 121873579. The reversal of 121873550 is 55378121.

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 11 ways as a sum of consecutive naturals, for example, 51839 + ... + 54138.

It is an arithmetic number, because the mean of its divisors is an integer number (9855954).

Almost surely, 2^121873550 is an apocalyptic number.

121873550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121873550 is a deficient number, since it is larger than the sum of its proper divisors (114669346).

121873550 is a wasteful number, since it uses less digits than its factorization.

121873550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106012 (or 106007 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 121873550 is about 11039.6354106465. The cubic root of 121873550 is about 495.7961544203.

The spelling of 121873550 in words is "one hundred twenty-one million, eight hundred seventy-three thousand, five hundred fifty".