221422268621 has 2 divisors, whose sum is σ = 221422268622. Its totient is φ = 221422268620.

The previous prime is 221422268467. The next prime is 221422268663. The reversal of 221422268621 is 126862224122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220251876100 + 1170392521 = 469310^2 + 34211^2 .

It is a cyclic number.

It is not a de Polignac number, because 221422268621 - 2¹⁰ = 221422267597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221422268681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110711134310 + 110711134311.

It is an arithmetic number, because the mean of its divisors is an integer number (110711134311).

Almost surely, 2^221422268621 is an apocalyptic number.

It is an amenable number.

221422268621 is a deficient number, since it is larger than the sum of its proper divisors (1).

221422268621 is an equidigital number, since it uses as much as digits as its factorization.

221422268621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73728, while the sum is 38.

The spelling of 221422268621 in words is "two hundred twenty-one billion, four hundred twenty-two million, two hundred sixty-eight thousand, six hundred twenty-one".