4121121240 has 160 divisors (see below), whose sum is σ = 13884750000. Its totient is φ = 1096333056.

The previous prime is 4121121239. The next prime is 4121121269. The reversal of 4121121240 is 421211214.

4121121240 is a `hidden beast` number, since 412 + 1 + 1 + 212 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

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 39 ways as a sum of consecutive naturals, for example, 1615486 + ... + 1618034.

Almost surely, 2^4121121240 is an apocalyptic number.

4121121240 is a gapful number since it is divisible by the number (40) 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 4121121240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6942375000).

4121121240 is an abundant number, since it is smaller than the sum of its proper divisors (9763628760).

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

4121121240 is a wasteful number, since it uses less digits than its factorization.

4121121240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3071 (or 3058 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 4121121240 is about 64195.9596859491. The cubic root of 4121121240 is about 1603.2643303546.

Adding to 4121121240 its reverse (421211214), we get a palindrome (4542332454).

The spelling of 4121121240 in words is "four billion, one hundred twenty-one million, one hundred twenty-one thousand, two hundred forty".