2142424421 has 2 divisors, whose sum is σ = 2142424422. Its totient is φ = 2142424420.

The previous prime is 2142424393. The next prime is 2142424429. The reversal of 2142424421 is 1244242412.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2142393796 + 30625 = 46286^2 + 175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2142424421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2142424429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1071212210 + 1071212211.

It is an arithmetic number, because the mean of its divisors is an integer number (1071212211).

It is a self-describing number.

Almost surely, 2^2142424421 is an apocalyptic number.

It is an amenable number.

2142424421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2142424421 is an equidigital number, since it uses as much as digits as its factorization.

2142424421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4096, while the sum is 26.

The square root of 2142424421 is about 46286.3308223929. The cubic root of 2142424421 is about 1289.1452023911.

Adding to 2142424421 its reverse (1244242412), we get a palindrome (3386666833).

The spelling of 2142424421 in words is "two billion, one hundred forty-two million, four hundred twenty-four thousand, four hundred twenty-one".