211122231 has 8 divisors (see below), whose sum is σ = 281602944. Its totient is φ = 140694840.

The previous prime is 211122211. The next prime is 211122251. The reversal of 211122231 is 132221112.

It is an interprime number because it is at equal distance from previous prime (211122211) and next prime (211122251).

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

It is not a de Polignac number, because 211122231 - 2¹¹ = 211120183 is a prime.

It is a super-2 number, since 2×211122231² = 89145192844834722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 211122231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122211) 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, 2931 + ... + 20756.

It is an arithmetic number, because the mean of its divisors is an integer number (35200368).

Almost surely, 2^211122231 is an apocalyptic number.

211122231 is a deficient number, since it is larger than the sum of its proper divisors (70480713).

211122231 is a wasteful number, since it uses less digits than its factorization.

211122231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26661.

The product of its digits is 48, while the sum is 15.

The square root of 211122231 is about 14530.0458017172. The cubic root of 211122231 is about 595.4491169307.

Adding to 211122231 its reverse (132221112), we get a palindrome (343343343).

It can be divided in two parts, 2111 and 22231, that added together give a palindrome (24342).

The spelling of 211122231 in words is "two hundred eleven million, one hundred twenty-two thousand, two hundred thirty-one".