22102020077 has 2 divisors, whose sum is σ = 22102020078. Its totient is φ = 22102020076.

The previous prime is 22102020071. The next prime is 22102020079. The reversal of 22102020077 is 77002020122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15091139716 + 7010880361 = 122846^2 + 83731^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22102020077 is a prime.

It is a super-2 number, since 2×22102020077² (a number of 21 digits) contains 22 as substring.

Together with 22102020079, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22102020071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11051010038 + 11051010039.

It is an arithmetic number, because the mean of its divisors is an integer number (11051010039).

Almost surely, 2^22102020077 is an apocalyptic number.

It is an amenable number.

22102020077 is a deficient number, since it is larger than the sum of its proper divisors (1).

22102020077 is an equidigital number, since it uses as much as digits as its factorization.

22102020077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784, while the sum is 23.

Adding to 22102020077 its reverse (77002020122), we get a palindrome (99104040199).

The spelling of 22102020077 in words is "twenty-two billion, one hundred two million, twenty thousand, seventy-seven".