221422047004237 has 2 divisors, whose sum is σ = 221422047004238. Its totient is φ = 221422047004236.

The previous prime is 221422047004201. The next prime is 221422047004241. The reversal of 221422047004237 is 732400740224122.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 159853009603401 + 61569037400836 = 12643299^2 + 7846594^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-221422047004237 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 221422047004237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221422047004297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110711023502118 + 110711023502119.

It is an arithmetic number, because the mean of its divisors is an integer number (110711023502119).

Almost surely, 2^{221422047004237} is an apocalyptic number.

It is an amenable number.

221422047004237 is a deficient number, since it is larger than the sum of its proper divisors (1).

221422047004237 is an equidigital number, since it uses as much as digits as its factorization.

221422047004237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 301056, while the sum is 40.

Adding to 221422047004237 its reverse (732400740224122), we get a palindrome (953822787228359).

The spelling of 221422047004237 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, forty-seven million, four thousand, two hundred thirty-seven".