211321112021 has 4 divisors (see below), whose sum is σ = 211332444000. Its totient is φ = 211309780044.

The previous prime is 211321111997. The next prime is 211321112039. The reversal of 211321112021 is 120211123112.

It is a happy number.

211321112021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 211321112021 - 2²² = 211316917717 is a prime.

It is a super-2 number, since 2×211321112021² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211321112521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5637971 + ... + 5675328.

It is an arithmetic number, because the mean of its divisors is an integer number (52833111000).

Almost surely, 2^211321112021 is an apocalyptic number.

It is an amenable number.

211321112021 is a deficient number, since it is larger than the sum of its proper divisors (11331979).

211321112021 is a wasteful number, since it uses less digits than its factorization.

211321112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11331978.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 211321112021 its reverse (120211123112), we get a palindrome (331532235133).

The spelling of 211321112021 in words is "two hundred eleven billion, three hundred twenty-one million, one hundred twelve thousand, twenty-one".