211131222 has 32 divisors (see below), whose sum is σ = 434294784. Its totient is φ = 68385600.

The previous prime is 211131203. The next prime is 211131227. The reversal of 211131222 is 222131112.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211131227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65083 + ... + 68249.

It is an arithmetic number, because the mean of its divisors is an integer number (13571712).

Almost surely, 2^211131222 is an apocalyptic number.

211131222 is an abundant number, since it is smaller than the sum of its proper divisors (223163562).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

211131222 is a wasteful number, since it uses less digits than its factorization.

211131222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3484.

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

The square root of 211131222 is about 14530.3551918045. The cubic root of 211131222 is about 595.4575695492.

Adding to 211131222 its reverse (222131112), we get a palindrome (433262334).

It can be divided in two parts, 2111 and 31222, that added together give a palindrome (33333).

The spelling of 211131222 in words is "two hundred eleven million, one hundred thirty-one thousand, two hundred twenty-two".