1312122120111 has 96 divisors (see below), whose sum is σ = 2161437198336. Its totient is φ = 759979584000.

The previous prime is 1312122120109. The next prime is 1312122120161. The reversal of 1312122120111 is 1110212212131.

It is a happy number.

1312122120111 is a `hidden beast` number, since 1 + 312 + 1 + 221 + 20 + 111 = 666.

It is not a de Polignac number, because 1312122120111 - 2¹ = 1312122120109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312122120161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 70470475 + ... + 70489091.

It is an arithmetic number, because the mean of its divisors is an integer number (22514970816).

Almost surely, 2^{1312122120111} is an apocalyptic number.

1312122120111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1312122120111 is a deficient number, since it is larger than the sum of its proper divisors (849315078225).

1312122120111 is a wasteful number, since it uses less digits than its factorization.

1312122120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19013 (or 19010 counting only the distinct ones).

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

Adding to 1312122120111 its reverse (1110212212131), we get a palindrome (2422334332242).

The spelling of 1312122120111 in words is "one trillion, three hundred twelve billion, one hundred twenty-two million, one hundred twenty thousand, one hundred eleven".