2211223112231 has 4 divisors (see below), whose sum is σ = 2527112128272. Its totient is φ = 1895334096192.

The previous prime is 2211223112221. The next prime is 2211223112261. The reversal of 2211223112231 is 1322113221122.

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-2211223112231 is a prime.

It is a super-2 number, since 2×2211223112231² (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 = 2211223112197 and 2211223112206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2211223112221) 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, 157944508010 + ... + 157944508023.

It is an arithmetic number, because the mean of its divisors is an integer number (631778032068).

Almost surely, 2^{2211223112231} is an apocalyptic number.

2211223112231 is a deficient number, since it is larger than the sum of its proper divisors (315889016041).

2211223112231 is an equidigital number, since it uses as much as digits as its factorization.

2211223112231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315889016040.

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

Adding to 2211223112231 its reverse (1322113221122), we get a palindrome (3533336333353).

The spelling of 2211223112231 in words is "two trillion, two hundred eleven billion, two hundred twenty-three million, one hundred twelve thousand, two hundred thirty-one".