121838535 has 48 divisors (see below), whose sum is σ = 259930944. Its totient is φ = 51411456.

The previous prime is 121838491. The next prime is 121838539. The reversal of 121838535 is 535838121.

It is not a de Polignac number, because 121838535 - 2⁷ = 121838407 is a prime.

It is a super-2 number, since 2×121838535² = 29689257221892450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 121838535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121838539) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10782 + ... + 18971.

It is an arithmetic number, because the mean of its divisors is an integer number (5415228).

Almost surely, 2^121838535 is an apocalyptic number.

121838535 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

121838535 is an abundant number, since it is smaller than the sum of its proper divisors (138092409).

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

121838535 is a wasteful number, since it uses less digits than its factorization.

121838535 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29784 (or 29781 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 121838535 is about 11038.0494200742. The cubic root of 121838535 is about 495.7486681386.

The spelling of 121838535 in words is "one hundred twenty-one million, eight hundred thirty-eight thousand, five hundred thirty-five".