2440220121 has 16 divisors (see below), whose sum is σ = 3772321920. Its totient is φ = 1556082000.

The previous prime is 2440220089. The next prime is 2440220191. The reversal of 2440220121 is 1210220442.

2440220121 is a `hidden beast` number, since 2 + 440 + 2 + 201 + 21 = 666.

It is not a de Polignac number, because 2440220121 - 2⁵ = 2440220089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2440220094 and 2440220103.

It is not an unprimeable number, because it can be changed into a prime (2440220191) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1964130 + ... + 1965371.

It is an arithmetic number, because the mean of its divisors is an integer number (235770120).

Almost surely, 2^2440220121 is an apocalyptic number.

It is an amenable number.

2440220121 is a deficient number, since it is larger than the sum of its proper divisors (1332101799).

2440220121 is a wasteful number, since it uses less digits than its factorization.

2440220121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3929533 (or 3929527 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 2440220121 is about 49398.5842003594. The cubic root of 2440220121 is about 1346.3035819488.

Adding to 2440220121 its reverse (1210220442), we get a palindrome (3650440563).

The spelling of 2440220121 in words is "two billion, four hundred forty million, two hundred twenty thousand, one hundred twenty-one".