201110020021021 has 4 divisors (see below), whose sum is σ = 201407080612572. Its totient is φ = 200812959429472.

The previous prime is 201110020020989. The next prime is 201110020021171. The reversal of 201110020021021 is 120120020011102.

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 181365772118521 + 19744247902500 = 13467211^2 + 4443450^2 .

It is a cyclic number.

It is not a de Polignac number, because 201110020021021 - 2⁵ = 201110020020989 is a prime.

It is a super-2 number, since 2×201110020021021² (a number of 29 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 = 201110020020992 and 201110020021010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201110020024021) 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, 148530294760 + ... + 148530296113.

It is an arithmetic number, because the mean of its divisors is an integer number (50351770153143).

Almost surely, 2^{201110020021021} is an apocalyptic number.

It is an amenable number.

201110020021021 is a deficient number, since it is larger than the sum of its proper divisors (297060591551).

201110020021021 is an equidigital number, since it uses as much as digits as its factorization.

201110020021021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297060591550.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 201110020021021 its reverse (120120020011102), we get a palindrome (321230040032123).

The spelling of 201110020021021 in words is "two hundred one trillion, one hundred ten billion, twenty million, twenty-one thousand, twenty-one".