121240040 has 16 divisors (see below), whose sum is σ = 272790180. Its totient is φ = 48496000.

The previous prime is 121240037. The next prime is 121240057. The reversal of 121240040 is 40042121.

It can be written as a sum of positive squares in 2 ways, for example, as 119990116 + 1249924 = 10954^2 + 1118^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121239997 and 121240024.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1515461 + ... + 1515540.

Almost surely, 2^121240040 is an apocalyptic number.

121240040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121240040 is an abundant number, since it is smaller than the sum of its proper divisors (151550140).

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

121240040 is a wasteful number, since it uses less digits than its factorization.

121240040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3031012 (or 3031008 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 121240040 is about 11010.9055031818. The cubic root of 121240040 is about 494.9355968314.

Adding to 121240040 its reverse (40042121), we get a palindrome (161282161).

The spelling of 121240040 in words is "one hundred twenty-one million, two hundred forty thousand, forty".