121751838 has 24 divisors (see below), whose sum is σ = 284088168. Its totient is φ = 37462032.

The previous prime is 121751827. The next prime is 121751863. The reversal of 121751838 is 838157121.

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, 259920 + ... + 260387.

It is an arithmetic number, because the mean of its divisors is an integer number (11837007).

Almost surely, 2^121751838 is an apocalyptic number.

121751838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

121751838 is an abundant number, since it is smaller than the sum of its proper divisors (162336330).

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

121751838 is a wasteful number, since it uses less digits than its factorization.

121751838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520328 (or 520325 counting only the distinct ones).

The product of its digits is 13440, while the sum is 36.

The square root of 121751838 is about 11034.1215327728. The cubic root of 121751838 is about 495.6310531307.

The spelling of 121751838 in words is "one hundred twenty-one million, seven hundred fifty-one thousand, eight hundred thirty-eight".