1121120200021 has 2 divisors, whose sum is σ = 1121120200022. Its totient is φ = 1121120200020.

The previous prime is 1121120200009. The next prime is 1121120200133. The reversal of 1121120200021 is 1200020211211.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1069869579025 + 51250620996 = 1034345^2 + 226386^2 .

It is a cyclic number.

It is not a de Polignac number, because 1121120200021 - 2⁷ = 1121120199893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1121120199974 and 1121120200010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1121120200001) 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, 560560100010 + 560560100011.

It is an arithmetic number, because the mean of its divisors is an integer number (560560100011).

Almost surely, 2^{1121120200021} is an apocalyptic number.

It is an amenable number.

1121120200021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1121120200021 is an equidigital number, since it uses as much as digits as its factorization.

1121120200021 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 13.

Adding to 1121120200021 its reverse (1200020211211), we get a palindrome (2321140411232).

The spelling of 1121120200021 in words is "one trillion, one hundred twenty-one billion, one hundred twenty million, two hundred thousand, twenty-one".