1311111222 has 8 divisors (see below), whose sum is σ = 2622222456. Its totient is φ = 437037072.

The previous prime is 1311111211. The next prime is 1311111223. The reversal of 1311111222 is 2221111131.

1311111222 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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

1311111222 is an admirable number.

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 (1311111223) 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, 109259263 + ... + 109259274.

It is an arithmetic number, because the mean of its divisors is an integer number (327777807).

Almost surely, 2^1311111222 is an apocalyptic number.

1311111222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1311111222 is a wasteful number, since it uses less digits than its factorization.

1311111222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218518542.

The product of its digits is 24, while the sum is 15.

The square root of 1311111222 is about 36209.2698352231. The cubic root of 1311111222 is about 1094.4934785394.

Adding to 1311111222 its reverse (2221111131), we get a palindrome (3532222353).

Subtracting 1311111222 from its reverse (2221111131), we obtain a palindrome (909999909).

The spelling of 1311111222 in words is "one billion, three hundred eleven million, one hundred eleven thousand, two hundred twenty-two".