1100120122021 has 2 divisors, whose sum is σ = 1100120122022. Its totient is φ = 1100120122020.

The previous prime is 1100120121959. The next prime is 1100120122091. The reversal of 1100120122021 is 1202210210011.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 699165217921 + 400954904100 = 836161^2 + 633210^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1100120122021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1100120121992 and 1100120122010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1100120122091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 550060061010 + 550060061011.

It is an arithmetic number, because the mean of its divisors is an integer number (550060061011).

Almost surely, 2^{1100120122021} is an apocalyptic number.

It is an amenable number.

1100120122021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1100120122021 is an equidigital number, since it uses as much as digits as its factorization.

1100120122021 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 1100120122021 its reverse (1202210210011), we get a palindrome (2302330332032).

The spelling of 1100120122021 in words is "one trillion, one hundred billion, one hundred twenty million, one hundred twenty-two thousand, twenty-one".