22220420177 has 2 divisors, whose sum is σ = 22220420178. Its totient is φ = 22220420176.

The previous prime is 22220420113. The next prime is 22220420179. The reversal of 22220420177 is 77102402222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21257931601 + 962488576 = 145801^2 + 31024^2 .

It is a cyclic number.

It is not a de Polignac number, because 22220420177 - 2⁶ = 22220420113 is a prime.

It is a super-2 number, since 2×22220420177² (a number of 21 digits) contains 22 as substring.

Together with 22220420179, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (22220420179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11110210088 + 11110210089.

It is an arithmetic number, because the mean of its divisors is an integer number (11110210089).

Almost surely, 2^22220420177 is an apocalyptic number.

It is an amenable number.

22220420177 is a deficient number, since it is larger than the sum of its proper divisors (1).

22220420177 is an equidigital number, since it uses as much as digits as its factorization.

22220420177 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 29.

Adding to 22220420177 its reverse (77102402222), we get a palindrome (99322822399).

The spelling of 22220420177 in words is "twenty-two billion, two hundred twenty million, four hundred twenty thousand, one hundred seventy-seven".