2124973421 has 4 divisors (see below), whose sum is σ = 2144468700. Its totient is φ = 2105478144.

The previous prime is 2124973391. The next prime is 2124973439. The reversal of 2124973421 is 1243794212.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1169298025 + 955675396 = 34195^2 + 30914^2 .

It is a cyclic number.

It is not a de Polignac number, because 2124973421 - 2¹⁰ = 2124972397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2124913421) 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 3 ways as a sum of consecutive naturals, for example, 9747476 + ... + 9747693.

It is an arithmetic number, because the mean of its divisors is an integer number (536117175).

Almost surely, 2^2124973421 is an apocalyptic number.

It is an amenable number.

2124973421 is a deficient number, since it is larger than the sum of its proper divisors (19495279).

2124973421 is a wasteful number, since it uses less digits than its factorization.

2124973421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19495278.

The product of its digits is 24192, while the sum is 35.

The square root of 2124973421 is about 46097.4339958310. The cubic root of 2124973421 is about 1285.6354351426.

The spelling of 2124973421 in words is "two billion, one hundred twenty-four million, nine hundred seventy-three thousand, four hundred twenty-one".