1422201421 has 2 divisors, whose sum is σ = 1422201422. Its totient is φ = 1422201420.

The previous prime is 1422201409. The next prime is 1422201427. The reversal of 1422201421 is 1241022241.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1259256196 + 162945225 = 35486^2 + 12765^2 .

It is an emirp because it is prime and its reverse (1241022241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1422201421 - 2¹⁵ = 1422168653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1422201427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711100710 + 711100711.

It is an arithmetic number, because the mean of its divisors is an integer number (711100711).

Almost surely, 2^1422201421 is an apocalyptic number.

It is an amenable number.

1422201421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1422201421 is an equidigital number, since it uses as much as digits as its factorization.

1422201421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1422201421 is about 37712.0858744249. The cubic root of 1422201421 is about 1124.5714044078.

Adding to 1422201421 its reverse (1241022241), we get a palindrome (2663223662).

It can be divided in two parts, 142220 and 1421, that added together give a square (143641 = 379²).

The spelling of 1422201421 in words is "one billion, four hundred twenty-two million, two hundred one thousand, four hundred twenty-one".