42202251338021 has 2 divisors, whose sum is σ = 42202251338022. Its totient is φ = 42202251338020.

The previous prime is 42202251337963. The next prime is 42202251338033. The reversal of 42202251338021 is 12083315220224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33099425304100 + 9102826033921 = 5753210^2 + 3017089^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42202251338021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42202251328021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21101125669010 + 21101125669011.

It is an arithmetic number, because the mean of its divisors is an integer number (21101125669011).

Almost surely, 2^{42202251338021} is an apocalyptic number.

It is an amenable number.

42202251338021 is a deficient number, since it is larger than the sum of its proper divisors (1).

42202251338021 is an equidigital number, since it uses as much as digits as its factorization.

42202251338021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 35.

Adding to 42202251338021 its reverse (12083315220224), we get a palindrome (54285566558245).

The spelling of 42202251338021 in words is "forty-two trillion, two hundred two billion, two hundred fifty-one million, three hundred thirty-eight thousand, twenty-one".