1121022222161 has 2 divisors, whose sum is σ = 1121022222162. Its totient is φ = 1121022222160.

The previous prime is 1121022222107. The next prime is 1121022222209. The reversal of 1121022222161 is 1612222201211.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 621535140625 + 499487081536 = 788375^2 + 706744^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121022222161 - 2¹⁴ = 1121022205777 is a prime.

It is not a weakly prime, because it can be changed into another prime (1121022212161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 560511111080 + 560511111081.

It is an arithmetic number, because the mean of its divisors is an integer number (560511111081).

Almost surely, 2^{1121022222161} is an apocalyptic number.

It is an amenable number.

1121022222161 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121022222161 is an equidigital number, since it uses as much as digits as its factorization.

1121022222161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 384, while the sum is 23.

Adding to 1121022222161 its reverse (1612222201211), we get a palindrome (2733244423372).

The spelling of 1121022222161 in words is "one trillion, one hundred twenty-one billion, twenty-two million, two hundred twenty-two thousand, one hundred sixty-one".