1121220010121 has 2 divisors, whose sum is σ = 1121220010122. Its totient is φ = 1121220010120.

The previous prime is 1121220010073. The next prime is 1121220010171. The reversal of 1121220010121 is 1210100221211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 843111440521 + 278108569600 = 918211^2 + 527360^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121220010121 - 2¹⁴ = 1121219993737 is a prime.

It is a super-2 number, since 2×1121220010121² (a number of 25 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1121220010096 and 1121220010105.

It is not a weakly prime, because it can be changed into another prime (1121220010171) 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, 560610005060 + 560610005061.

It is an arithmetic number, because the mean of its divisors is an integer number (560610005061).

Almost surely, 2^{1121220010121} is an apocalyptic number.

It is an amenable number.

1121220010121 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121220010121 is an equidigital number, since it uses as much as digits as its factorization.

1121220010121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 1121220010121 its reverse (1210100221211), we get a palindrome (2331320231332).

The spelling of 1121220010121 in words is "one trillion, one hundred twenty-one billion, two hundred twenty million, ten thousand, one hundred twenty-one".