2211212231 has 4 divisors (see below), whose sum is σ = 2213236392. Its totient is φ = 2209188072.

The previous prime is 2211212183. The next prime is 2211212279. The reversal of 2211212231 is 1322121122.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2211212183) and next prime (2211212279).

It is a cyclic number.

It is not a de Polignac number, because 2211212231 - 2²² = 2207017927 is a prime.

It is a super-2 number, since 2×2211212231² = 9778919061047994722, which 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 (2211262231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1010441 + ... + 1012626.

It is an arithmetic number, because the mean of its divisors is an integer number (553309098).

Almost surely, 2^2211212231 is an apocalyptic number.

2211212231 is a deficient number, since it is larger than the sum of its proper divisors (2024161).

2211212231 is a wasteful number, since it uses less digits than its factorization.

2211212231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2024160.

The product of its digits is 96, while the sum is 17.

The square root of 2211212231 is about 47023.5284830902. The cubic root of 2211212231 is about 1302.7971784430.

Adding to 2211212231 its reverse (1322121122), we get a palindrome (3533333353).

It can be divided in two parts, 22112 and 12231, that added together give a palindrome (34343).

The spelling of 2211212231 in words is "two billion, two hundred eleven million, two hundred twelve thousand, two hundred thirty-one".