1042224305021 has 2 divisors, whose sum is σ = 1042224305022. Its totient is φ = 1042224305020.

The previous prime is 1042224304997. The next prime is 1042224305051. The reversal of 1042224305021 is 1205034222401.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 895275516100 + 146948788921 = 946190^2 + 383339^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1042224305021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042224305051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 521112152510 + 521112152511.

It is an arithmetic number, because the mean of its divisors is an integer number (521112152511).

Almost surely, 2^{1042224305021} is an apocalyptic number.

It is an amenable number.

1042224305021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042224305021 is an equidigital number, since it uses as much as digits as its factorization.

1042224305021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 1042224305021 its reverse (1205034222401), we get a palindrome (2247258527422).

The spelling of 1042224305021 in words is "one trillion, forty-two billion, two hundred twenty-four million, three hundred five thousand, twenty-one".