121000240 has 40 divisors (see below), whose sum is σ = 293561568. Its totient is φ = 46295040.

The previous prime is 121000213. The next prime is 121000261. The reversal of 121000240 is 42000121.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31041 + ... + 34720.

Almost surely, 2^121000240 is an apocalyptic number.

121000240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121000240 is an abundant number, since it is smaller than the sum of its proper divisors (172561328).

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

121000240 is a wasteful number, since it uses less digits than its factorization.

121000240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65797 (or 65791 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

The square root of 121000240 is about 11000.0109090855. The cubic root of 121000240 is about 494.6090713387.

Adding to 121000240 its reverse (42000121), we get a palindrome (163000361).

The spelling of 121000240 in words is "one hundred twenty-one million, two hundred forty", and thus it is an aban number.