2221071121 has 2 divisors, whose sum is σ = 2221071122. Its totient is φ = 2221071120.

The previous prime is 2221071079. The next prime is 2221071137. The reversal of 2221071121 is 1211701222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1884862225 + 336208896 = 43415^2 + 18336^2 .

It is a cyclic number.

It is not a de Polignac number, because 2221071121 - 2¹³ = 2221062929 is a prime.

It is not a weakly prime, because it can be changed into another prime (2221071191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1110535560 + 1110535561.

It is an arithmetic number, because the mean of its divisors is an integer number (1110535561).

Almost surely, 2^2221071121 is an apocalyptic number.

It is an amenable number.

2221071121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2221071121 is an equidigital number, since it uses as much as digits as its factorization.

2221071121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 2221071121 is about 47128.2412254054. The cubic root of 2221071121 is about 1304.7305210271.

Adding to 2221071121 its reverse (1211701222), we get a palindrome (3432772343).

The spelling of 2221071121 in words is "two billion, two hundred twenty-one million, seventy-one thousand, one hundred twenty-one".