121333540 has 24 divisors (see below), whose sum is σ = 255632832. Its totient is φ = 48374880.

The previous prime is 121333523. The next prime is 121333549. The reversal of 121333540 is 45333121.

It is not an unprimeable number, because it can be changed into a prime (121333549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3534 + ... + 15973.

It is an arithmetic number, because the mean of its divisors is an integer number (10651368).

Almost surely, 2^121333540 is an apocalyptic number.

121333540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121333540 is an abundant number, since it is smaller than the sum of its proper divisors (134299292).

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

121333540 is a wasteful number, since it uses less digits than its factorization.

121333540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19827 (or 19825 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 121333540 is about 11015.1504755950. The cubic root of 121333540 is about 495.0627951489.

Adding to 121333540 its reverse (45333121), we get a palindrome (166666661).

The spelling of 121333540 in words is "one hundred twenty-one million, three hundred thirty-three thousand, five hundred forty".