221422047311461 has 2 divisors, whose sum is σ = 221422047311462. Its totient is φ = 221422047311460.

The previous prime is 221422047311351. The next prime is 221422047311501. The reversal of 221422047311461 is 164113740224122.

It is an a-pointer prime, because the next prime (221422047311501) can be obtained adding 221422047311461 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 161125424603361 + 60296622708100 = 12693519^2 + 7765090^2 .

It is a cyclic number.

It is not a de Polignac number, because 221422047311461 - 2⁹ = 221422047310949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (221422047311561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110711023655730 + 110711023655731.

It is an arithmetic number, because the mean of its divisors is an integer number (110711023655731).

Almost surely, 2^{221422047311461} is an apocalyptic number.

It is an amenable number.

221422047311461 is a deficient number, since it is larger than the sum of its proper divisors (1).

221422047311461 is an equidigital number, since it uses as much as digits as its factorization.

221422047311461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 129024, while the sum is 40.

Adding to 221422047311461 its reverse (164113740224122), we get a palindrome (385535787535583).

The spelling of 221422047311461 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, forty-seven million, three hundred eleven thousand, four hundred sixty-one".