121040040 has 128 divisors (see below), whose sum is σ = 404766720. Its totient is φ = 28704000.

The previous prime is 121040033. The next prime is 121040041. The reversal of 121040040 is 40040121.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 121039998 and 121040025.

It is not an unprimeable number, because it can be changed into a prime (121040041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61065 + ... + 63015.

It is an arithmetic number, because the mean of its divisors is an integer number (3162240).

Almost surely, 2^121040040 is an apocalyptic number.

121040040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121040040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (202383360).

121040040 is an abundant number, since it is smaller than the sum of its proper divisors (283726680).

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

121040040 is a wasteful number, since it uses less digits than its factorization.

121040040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2023 (or 2019 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 121040040 is about 11001.8198494613. The cubic root of 121040040 is about 494.6632951515.

Adding to 121040040 its reverse (40040121), we get a palindrome (161080161).

The spelling of 121040040 in words is "one hundred twenty-one million, forty thousand, forty".