2212231211231 has 4 divisors (see below), whose sum is σ = 2212698621672. Its totient is φ = 2211763800792.

The previous prime is 2212231211191. The next prime is 2212231211233. The reversal of 2212231211231 is 1321121322122.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2212231211231 is a prime.

It is a super-2 number, since 2×2212231211231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2212231211197 and 2212231211206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2212231211233) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233698121 + ... + 233707586.

It is an arithmetic number, because the mean of its divisors is an integer number (553174655418).

Almost surely, 2^{2212231211231} is an apocalyptic number.

2212231211231 is a deficient number, since it is larger than the sum of its proper divisors (467410441).

2212231211231 is an equidigital number, since it uses as much as digits as its factorization.

2212231211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467410440.

The product of its digits is 576, while the sum is 23.

Adding to 2212231211231 its reverse (1321121322122), we get a palindrome (3533352533353).

The spelling of 2212231211231 in words is "two trillion, two hundred twelve billion, two hundred thirty-one million, two hundred eleven thousand, two hundred thirty-one".