1220112222001 has 2 divisors, whose sum is σ = 1220112222002. Its totient is φ = 1220112222000.

The previous prime is 1220112221953. The next prime is 1220112222011. The reversal of 1220112222001 is 1002222110221.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 921121982001 + 298990240000 = 959751^2 + 546800^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220112222001 - 2¹³ = 1220112213809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1220112222011) 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, 610056111000 + 610056111001.

It is an arithmetic number, because the mean of its divisors is an integer number (610056111001).

Almost surely, 2^{1220112222001} is an apocalyptic number.

It is an amenable number.

1220112222001 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220112222001 is an equidigital number, since it uses as much as digits as its factorization.

1220112222001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 1220112222001 its reverse (1002222110221), we get a palindrome (2222334332222).

The spelling of 1220112222001 in words is "one trillion, two hundred twenty billion, one hundred twelve million, two hundred twenty-two thousand, one".