1311122201112 has 48 divisors (see below), whose sum is σ = 3665502934080. Its totient is φ = 422942644800.

The previous prime is 1311122201101. The next prime is 1311122201117. The reversal of 1311122201112 is 2111022211131.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311122201117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 293707939 + ... + 293712402.

It is an arithmetic number, because the mean of its divisors is an integer number (76364644460).

Almost surely, 2^{1311122201112} is an apocalyptic number.

1311122201112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311122201112 is an abundant number, since it is smaller than the sum of its proper divisors (2354380732968).

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

1311122201112 is a wasteful number, since it uses less digits than its factorization.

1311122201112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 587420384 (or 587420377 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 1311122201112 its reverse (2111022211131), we get a palindrome (3422144412243).

The spelling of 1311122201112 in words is "one trillion, three hundred eleven billion, one hundred twenty-two million, two hundred one thousand, one hundred twelve".