2221200000077 has 2 divisors, whose sum is σ = 2221200000078. Its totient is φ = 2221200000076.

The previous prime is 2221199999987. The next prime is 2221200000083. The reversal of 2221200000077 is 7700000021222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1226381271241 + 994818728836 = 1107421^2 + 997406^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221200000077 - 2²⁴ = 2221183222861 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2221199999998 and 2221200000061.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2221200000977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110600000038 + 1110600000039.

It is an arithmetic number, because the mean of its divisors is an integer number (1110600000039).

Almost surely, 2^{2221200000077} is an apocalyptic number.

It is an amenable number.

2221200000077 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221200000077 is an equidigital number, since it uses as much as digits as its factorization.

2221200000077 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2221200000077 its reverse (7700000021222), we get a palindrome (9921200021299).

The spelling of 2221200000077 in words is "two trillion, two hundred twenty-one billion, two hundred million, seventy-seven", and thus it is an aban number.