2040424242421 has 2 divisors, whose sum is σ = 2040424242422. Its totient is φ = 2040424242420.

The previous prime is 2040424242397. The next prime is 2040424242469. The reversal of 2040424242421 is 1242424240402.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2020906755396 + 19517487025 = 1421586^2 + 139705^2 .

It is a cyclic number.

It is not a de Polignac number, because 2040424242421 - 2⁹ = 2040424241909 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2040424242481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1020212121210 + 1020212121211.

It is an arithmetic number, because the mean of its divisors is an integer number (1020212121211).

Almost surely, 2^{2040424242421} is an apocalyptic number.

It is an amenable number.

2040424242421 is a deficient number, since it is larger than the sum of its proper divisors (1).

2040424242421 is an equidigital number, since it uses as much as digits as its factorization.

2040424242421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32768, while the sum is 31.

Adding to 2040424242421 its reverse (1242424240402), we get a palindrome (3282848482823).

The spelling of 2040424242421 in words is "two trillion, forty billion, four hundred twenty-four million, two hundred forty-two thousand, four hundred twenty-one".