22012122277 has 2 divisors, whose sum is σ = 22012122278. Its totient is φ = 22012122276.

The previous prime is 22012122263. The next prime is 22012122289. The reversal of 22012122277 is 77222121022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21999119041 + 13003236 = 148321^2 + 3606^2 .

It is a cyclic number.

It is not a de Polignac number, because 22012122277 - 2¹⁹ = 22011597989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22012122227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11006061138 + 11006061139.

It is an arithmetic number, because the mean of its divisors is an integer number (11006061139).

Almost surely, 2^22012122277 is an apocalyptic number.

It is an amenable number.

22012122277 is a deficient number, since it is larger than the sum of its proper divisors (1).

22012122277 is an equidigital number, since it uses as much as digits as its factorization.

22012122277 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3136, while the sum is 28.

Adding to 22012122277 its reverse (77222121022), we get a palindrome (99234243299).

The spelling of 22012122277 in words is "twenty-two billion, twelve million, one hundred twenty-two thousand, two hundred seventy-seven".