11112021020021 has 4 divisors (see below), whose sum is σ = 11412345912492. Its totient is φ = 10811696127552.

The previous prime is 11112021020017. The next prime is 11112021020041. The reversal of 11112021020021 is 12002012021111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 10492163983921 + 619857036100 = 3239161^2 + 787310^2 .

It is a cyclic number.

It is not a de Polignac number, because 11112021020021 - 2² = 11112021020017 is a prime.

It is a super-2 number, since 2×11112021020021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11112021019978 and 11112021020005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11112021020041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 150162446180 + ... + 150162446253.

It is an arithmetic number, because the mean of its divisors is an integer number (2853086478123).

Almost surely, 2^{11112021020021} is an apocalyptic number.

It is an amenable number.

11112021020021 is a deficient number, since it is larger than the sum of its proper divisors (300324892471).

11112021020021 is an equidigital number, since it uses as much as digits as its factorization.

11112021020021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300324892470.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 11112021020021 its reverse (12002012021111), we get a palindrome (23114033041132).

The spelling of 11112021020021 in words is "eleven trillion, one hundred twelve billion, twenty-one million, twenty thousand, twenty-one".