11101100111021 has 2 divisors, whose sum is σ = 11101100111022. Its totient is φ = 11101100111020.

The previous prime is 11101100110993. The next prime is 11101100111033. The reversal of 11101100111021 is 12011100110111.

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., 9958095366025 + 1143004744996 = 3155645^2 + 1069114^2 .

It is a cyclic number.

It is not a de Polignac number, because 11101100111021 - 2⁶ = 11101100110957 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 = 11101100110993 and 11101100111011.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11101100111051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5550550055510 + 5550550055511.

It is an arithmetic number, because the mean of its divisors is an integer number (5550550055511).

Almost surely, 2^{11101100111021} is an apocalyptic number.

It is an amenable number.

11101100111021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11101100111021 is an equidigital number, since it uses as much as digits as its factorization.

11101100111021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 11101100111021 its reverse (12011100110111), we get a palindrome (23112200221132).

The spelling of 11101100111021 in words is "eleven trillion, one hundred one billion, one hundred million, one hundred eleven thousand, twenty-one".