211112021 has 8 divisors (see below), whose sum is σ = 222388320. Its totient is φ = 199852272.

The previous prime is 211111997. The next prime is 211112023. The reversal of 211112021 is 120211112.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211112021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211111993 and 211112011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211112023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28886 + ... + 35448.

It is an arithmetic number, because the mean of its divisors is an integer number (27798540).

Almost surely, 2^211112021 is an apocalyptic number.

It is an amenable number.

211112021 is a deficient number, since it is larger than the sum of its proper divisors (11276299).

211112021 is a wasteful number, since it uses less digits than its factorization.

211112021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8275.

The product of its (nonzero) digits is 8, while the sum is 11.

The square root of 211112021 is about 14529.6944565259. The cubic root of 211112021 is about 595.4395180150.

Adding to 211112021 its reverse (120211112), we get a palindrome (331323133).

Subtracting from 211112021 its reverse (120211112), we obtain a palindrome (90900909).

It can be divided in two parts, 21111 and 2021, that added together give a palindrome (23132).

The spelling of 211112021 in words is "two hundred eleven million, one hundred twelve thousand, twenty-one".