2444131221 has 16 divisors (see below), whose sum is σ = 3800400000. Its totient is φ = 1396645824.

The previous prime is 2444131211. The next prime is 2444131241. The reversal of 2444131221 is 1221314442.

It is not a de Polignac number, because 2444131221 - 2⁵ = 2444131189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2444131191 and 2444131200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2444131201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1186596 + ... + 1188653.

It is an arithmetic number, because the mean of its divisors is an integer number (237525000).

Almost surely, 2^2444131221 is an apocalyptic number.

2444131221 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2444131221 is a deficient number, since it is larger than the sum of its proper divisors (1356268779).

2444131221 is an equidigital number, since it uses as much as digits as its factorization.

2444131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2375273 (or 2375259 counting only the distinct ones).

The product of its digits is 1536, while the sum is 24.

The square root of 2444131221 is about 49438.1555177780. The cubic root of 2444131221 is about 1347.0224675473.

Adding to 2444131221 its reverse (1221314442), we get a palindrome (3665445663).

The spelling of 2444131221 in words is "two billion, four hundred forty-four million, one hundred thirty-one thousand, two hundred twenty-one".