2121489441 has 16 divisors (see below), whose sum is σ = 3308366400. Its totient is φ = 1339887744.

The previous prime is 2121489437. The next prime is 2121489457. The reversal of 2121489441 is 1449841212.

It is not a de Polignac number, because 2121489441 - 2² = 2121489437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2121489396 and 2121489405.

It is not an unprimeable number, because it can be changed into a prime (2121489401) 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, 2067216 + ... + 2068241.

It is an arithmetic number, because the mean of its divisors is an integer number (206772900).

Almost surely, 2^2121489441 is an apocalyptic number.

It is an amenable number.

2121489441 is a deficient number, since it is larger than the sum of its proper divisors (1186876959).

2121489441 is a wasteful number, since it uses less digits than its factorization.

2121489441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4135485 (or 4135479 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 2121489441 is about 46059.6291886941. The cubic root of 2121489441 is about 1284.9324336783.

The spelling of 2121489441 in words is "two billion, one hundred twenty-one million, four hundred eighty-nine thousand, four hundred forty-one".