211121112021 has 8 divisors (see below), whose sum is σ = 281684125824. Its totient is φ = 140652753120.

The previous prime is 211121112017. The next prime is 211121112049. The reversal of 211121112021 is 120211121112.

It is a happy number.

211121112021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 211121112021 - 2² = 211121112017 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211121112001) 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 7 ways as a sum of consecutive naturals, for example, 23658520 + ... + 23667441.

It is an arithmetic number, because the mean of its divisors is an integer number (35210515728).

Almost surely, 2^211121112021 is an apocalyptic number.

It is an amenable number.

211121112021 is a deficient number, since it is larger than the sum of its proper divisors (70563013803).

211121112021 is a wasteful number, since it uses less digits than its factorization.

211121112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47327451.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 211121112021 its reverse (120211121112), we get a palindrome (331332233133).

Subtracting from 211121112021 its reverse (120211121112), we obtain a palindrome (90909990909).

The spelling of 211121112021 in words is "two hundred eleven billion, one hundred twenty-one million, one hundred twelve thousand, twenty-one".