1311212231222 has 8 divisors (see below), whose sum is σ = 1970058576576. Its totient is φ = 654526039032.

The previous prime is 1311212231221. The next prime is 1311212231243. The reversal of 1311212231222 is 2221322121131.

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

It is a super-2 number, since 2×1311212231222² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311212231221) 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, 540036773 + ... + 540039200.

It is an arithmetic number, because the mean of its divisors is an integer number (246257322072).

Almost surely, 2^{1311212231222} is an apocalyptic number.

1311212231222 is a deficient number, since it is larger than the sum of its proper divisors (658846345354).

1311212231222 is a wasteful number, since it uses less digits than its factorization.

1311212231222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1080076582.

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

Adding to 1311212231222 its reverse (2221322121131), we get a palindrome (3532534352353).

The spelling of 1311212231222 in words is "one trillion, three hundred eleven billion, two hundred twelve million, two hundred thirty-one thousand, two hundred twenty-two".