11112021010021 has 2 divisors, whose sum is σ = 11112021010022. Its totient is φ = 11112021010020.

The previous prime is 11112021009997. The next prime is 11112021010073. The reversal of 11112021010021 is 12001012021111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9100690060225 + 2011330949796 = 3016735^2 + 1418214^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112021010021 - 2²⁹ = 11111484139109 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11112021009983 and 11112021010010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11112021010721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5556010505010 + 5556010505011.

It is an arithmetic number, because the mean of its divisors is an integer number (5556010505011).

Almost surely, 2^{11112021010021} is an apocalyptic number.

It is an amenable number.

11112021010021 is a deficient number, since it is larger than the sum of its proper divisors (1).

11112021010021 is an equidigital number, since it uses as much as digits as its factorization.

11112021010021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11112021010021 its reverse (12001012021111), we get a palindrome (23113033031132).

The spelling of 11112021010021 in words is "eleven trillion, one hundred twelve billion, twenty-one million, ten thousand, twenty-one".