1122222120121 has 2 divisors, whose sum is σ = 1122222120122. Its totient is φ = 1122222120120.

The previous prime is 1122222120119. The next prime is 1122222120137. The reversal of 1122222120121 is 1210212222211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 988759764496 + 133462355625 = 994364^2 + 365325^2 .

It is an emirp because it is prime and its reverse (1210212222211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1122222120121 - 2¹ = 1122222120119 is a prime.

Together with 1122222120119, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1122222120821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 561111060060 + 561111060061.

It is an arithmetic number, because the mean of its divisors is an integer number (561111060061).

Almost surely, 2^{1122222120121} is an apocalyptic number.

It is an amenable number.

1122222120121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1122222120121 is an equidigital number, since it uses as much as digits as its factorization.

1122222120121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 1122222120121 its reverse (1210212222211), we get a palindrome (2332434342332).

The spelling of 1122222120121 in words is "one trillion, one hundred twenty-two billion, two hundred twenty-two million, one hundred twenty thousand, one hundred twenty-one".