1100113121021 has 2 divisors, whose sum is σ = 1100113121022. Its totient is φ = 1100113121020.

The previous prime is 1100113120999. The next prime is 1100113121057. The reversal of 1100113121021 is 1201213110011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 770936680900 + 329176440121 = 878030^2 + 573739^2 .

It is a cyclic number.

It is not a de Polignac number, because 1100113121021 - 2³⁸ = 825235214077 is a prime.

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 = 1100113120987 and 1100113121005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100113121321) 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, 550056560510 + 550056560511.

It is an arithmetic number, because the mean of its divisors is an integer number (550056560511).

Almost surely, 2^{1100113121021} is an apocalyptic number.

It is an amenable number.

1100113121021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100113121021 is an equidigital number, since it uses as much as digits as its factorization.

1100113121021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 1100113121021 its reverse (1201213110011), we get a palindrome (2301326231032).

The spelling of 1100113121021 in words is "one trillion, one hundred billion, one hundred thirteen million, one hundred twenty-one thousand, twenty-one".