211021220112021 has 12 divisors (see below), whose sum is σ = 332518286237280. Its totient is φ = 127891648552680.

The previous prime is 211021220112013. The next prime is 211021220112029. The reversal of 211021220112021 is 120211022120112.

211021220112021 is a `hidden beast` number, since 2 + 110 + 212 + 201 + 120 + 21 = 666.

It is an interprime number because it is at equal distance from previous prime (211021220112013) and next prime (211021220112029).

It is not a de Polignac number, because 211021220112021 - 2³ = 211021220112013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 211021220111985 and 211021220112003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211021220112029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1065763737841 + ... + 1065763738038.

It is an arithmetic number, because the mean of its divisors is an integer number (27709857186440).

Almost surely, 2^{211021220112021} is an apocalyptic number.

It is an amenable number.

211021220112021 is a deficient number, since it is larger than the sum of its proper divisors (121497066125259).

211021220112021 is a wasteful number, since it uses less digits than its factorization.

211021220112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2131527475896 (or 2131527475893 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 211021220112021 its reverse (120211022120112), we get a palindrome (331232242232133).

The spelling of 211021220112021 in words is "two hundred eleven trillion, twenty-one billion, two hundred twenty million, one hundred twelve thousand, twenty-one".