42228464021 has 2 divisors, whose sum is σ = 42228464022. Its totient is φ = 42228464020.

The previous prime is 42228463951. The next prime is 42228464059. The reversal of 42228464021 is 12046482224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33567369796 + 8661094225 = 183214^2 + 93065^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42228464021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42228464821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21114232010 + 21114232011.

It is an arithmetic number, because the mean of its divisors is an integer number (21114232011).

Almost surely, 2^42228464021 is an apocalyptic number.

It is an amenable number.

42228464021 is a deficient number, since it is larger than the sum of its proper divisors (1).

42228464021 is an equidigital number, since it uses as much as digits as its factorization.

42228464021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49152, while the sum is 35.

The spelling of 42228464021 in words is "forty-two billion, two hundred twenty-eight million, four hundred sixty-four thousand, twenty-one".