1311122231222 has 4 divisors (see below), whose sum is σ = 1966683346836. Its totient is φ = 655561115610.

The previous prime is 1311122231219. The next prime is 1311122231239. The reversal of 1311122231222 is 2221322211131.

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

It is a super-2 number, since 2×1311122231222² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327780557804 + ... + 327780557807.

It is an arithmetic number, because the mean of its divisors is an integer number (491670836709).

Almost surely, 2^{1311122231222} is an apocalyptic number.

1311122231222 is a deficient number, since it is larger than the sum of its proper divisors (655561115614).

1311122231222 is an equidigital number, since it uses as much as digits as its factorization.

1311122231222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 655561115613.

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

Adding to 1311122231222 its reverse (2221322211131), we get a palindrome (3532444442353).

The spelling of 1311122231222 in words is "one trillion, three hundred eleven billion, one hundred twenty-two million, two hundred thirty-one thousand, two hundred twenty-two".