11020111111021 has 4 divisors (see below), whose sum is σ = 11026376099200. Its totient is φ = 11013846122844.

The previous prime is 11020111111013. The next prime is 11020111111057. The reversal of 11020111111021 is 12011111102011.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11020111111021 - 2³ = 11020111111013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11020111110992 and 11020111111010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11020111111421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3132491451 + ... + 3132494968.

It is an arithmetic number, because the mean of its divisors is an integer number (2756594024800).

Almost surely, 2^{11020111111021} is an apocalyptic number.

It is an amenable number.

11020111111021 is a deficient number, since it is larger than the sum of its proper divisors (6264988179).

11020111111021 is an equidigital number, since it uses as much as digits as its factorization.

11020111111021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6264988178.

The product of its (nonzero) digits is 4, while the sum is 13.

Adding to 11020111111021 its reverse (12011111102011), we get a palindrome (23031222213032).

The spelling of 11020111111021 in words is "eleven trillion, twenty billion, one hundred eleven million, one hundred eleven thousand, twenty-one".