422132166821 has 2 divisors, whose sum is σ = 422132166822. Its totient is φ = 422132166820.

The previous prime is 422132166817. The next prime is 422132166839. The reversal of 422132166821 is 128661231224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 274895733025 + 147236433796 = 524305^2 + 383714^2 .

It is a cyclic number.

It is not a de Polignac number, because 422132166821 - 2² = 422132166817 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (422132136821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211066083410 + 211066083411.

It is an arithmetic number, because the mean of its divisors is an integer number (211066083411).

Almost surely, 2^422132166821 is an apocalyptic number.

It is an amenable number.

422132166821 is a deficient number, since it is larger than the sum of its proper divisors (1).

422132166821 is an equidigital number, since it uses as much as digits as its factorization.

422132166821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 55296, while the sum is 38.

The spelling of 422132166821 in words is "four hundred twenty-two billion, one hundred thirty-two million, one hundred sixty-six thousand, eight hundred twenty-one".