4202164438421 has 2 divisors, whose sum is σ = 4202164438422. Its totient is φ = 4202164438420.

The previous prime is 4202164438331. The next prime is 4202164438447. The reversal of 4202164438421 is 1248344612024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2832199531396 + 1369964907025 = 1682914^2 + 1170455^2 .

It is a cyclic number.

It is not a de Polignac number, because 4202164438421 - 2¹⁰ = 4202164437397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4202164438471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2101082219210 + 2101082219211.

It is an arithmetic number, because the mean of its divisors is an integer number (2101082219211).

Almost surely, 2^{4202164438421} is an apocalyptic number.

It is an amenable number.

4202164438421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4202164438421 is an equidigital number, since it uses as much as digits as its factorization.

4202164438421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 294912, while the sum is 41.

The spelling of 4202164438421 in words is "four trillion, two hundred two billion, one hundred sixty-four million, four hundred thirty-eight thousand, four hundred twenty-one".