2141242421 has 4 divisors (see below), whose sum is σ = 2149202700. Its totient is φ = 2133282144.

The previous prime is 2141242399. The next prime is 2141242423. The reversal of 2141242421 is 1242421412.

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 619462321 + 1521780100 = 24889^2 + 39010^2 .

It is a cyclic number.

It is not a de Polignac number, because 2141242421 - 2¹⁰ = 2141241397 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 (2141242423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3979736 + ... + 3980273.

It is an arithmetic number, because the mean of its divisors is an integer number (537300675).

Almost surely, 2^2141242421 is an apocalyptic number.

It is an amenable number.

2141242421 is a deficient number, since it is larger than the sum of its proper divisors (7960279).

2141242421 is an equidigital number, since it uses as much as digits as its factorization.

2141242421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7960278.

The product of its digits is 1024, while the sum is 23.

The square root of 2141242421 is about 46273.5607123550. The cubic root of 2141242421 is about 1288.9080800719.

Adding to 2141242421 its reverse (1242421412), we get a palindrome (3383663833).

The spelling of 2141242421 in words is "two billion, one hundred forty-one million, two hundred forty-two thousand, four hundred twenty-one".