22122111877 has 2 divisors, whose sum is σ = 22122111878. Its totient is φ = 22122111876.

The previous prime is 22122111859. The next prime is 22122111899. The reversal of 22122111877 is 77811122122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20976018561 + 1146093316 = 144831^2 + 33854^2 .

It is a cyclic number.

It is not a de Polignac number, because 22122111877 - 2¹¹ = 22122109829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22122111377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11061055938 + 11061055939.

It is an arithmetic number, because the mean of its divisors is an integer number (11061055939).

Almost surely, 2^22122111877 is an apocalyptic number.

It is an amenable number.

22122111877 is a deficient number, since it is larger than the sum of its proper divisors (1).

22122111877 is an equidigital number, since it uses as much as digits as its factorization.

22122111877 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6272, while the sum is 34.

Adding to 22122111877 its reverse (77811122122), we get a palindrome (99933233999).

The spelling of 22122111877 in words is "twenty-two billion, one hundred twenty-two million, one hundred eleven thousand, eight hundred seventy-seven".