422011400021 has 2 divisors, whose sum is σ = 422011400022. Its totient is φ = 422011400020.

The previous prime is 422011400011. The next prime is 422011400087. The reversal of 422011400021 is 120004110224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 238887315121 + 183124084900 = 488761^2 + 427930^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-422011400021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422011400011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211005700010 + 211005700011.

It is an arithmetic number, because the mean of its divisors is an integer number (211005700011).

Almost surely, 2^422011400021 is an apocalyptic number.

It is an amenable number.

422011400021 is a deficient number, since it is larger than the sum of its proper divisors (1).

422011400021 is an equidigital number, since it uses as much as digits as its factorization.

422011400021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 422011400021 its reverse (120004110224), we get a palindrome (542015510245).

The spelling of 422011400021 in words is "four hundred twenty-two billion, eleven million, four hundred thousand, twenty-one".