2431220121 has 12 divisors (see below), whose sum is σ = 3831013680. Its totient is φ = 1473466680.

The previous prime is 2431220053. The next prime is 2431220177. The reversal of 2431220121 is 1210221342.

It is a happy number.

2431220121 is a `hidden beast` number, since 2 + 431 + 220 + 12 + 1 = 666.

2431220121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-2431220121 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2431220094 and 2431220103.

It is not an unprimeable number, because it can be changed into a prime (2431220321) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12278791 + ... + 12278988.

It is an arithmetic number, because the mean of its divisors is an integer number (319251140).

Almost surely, 2^2431220121 is an apocalyptic number.

It is an amenable number.

2431220121 is a deficient number, since it is larger than the sum of its proper divisors (1399793559).

2431220121 is a wasteful number, since it uses less digits than its factorization.

2431220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24557796 (or 24557793 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 2431220121 is about 49307.4043222719. The cubic root of 2431220121 is about 1344.6464009690.

Adding to 2431220121 its reverse (1210221342), we get a palindrome (3641441463).

The spelling of 2431220121 in words is "two billion, four hundred thirty-one million, two hundred twenty thousand, one hundred twenty-one".