1311112120111 has 8 divisors (see below), whose sum is σ = 1315933020864. Its totient is φ = 1306292319360.

The previous prime is 1311112120099. The next prime is 1311112120139. The reversal of 1311112120111 is 1110212111131.

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

It is a cyclic number.

It is not a de Polignac number, because 1311112120111 - 2²³ = 1311103731503 is a prime.

It is a super-2 number, since 2×1311112120111² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311112520111) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2152515 + ... + 2693611.

It is an arithmetic number, because the mean of its divisors is an integer number (164491627608).

Almost surely, 2^{1311112120111} is an apocalyptic number.

1311112120111 is a deficient number, since it is larger than the sum of its proper divisors (4820900753).

1311112120111 is an equidigital number, since it uses as much as digits as its factorization.

1311112120111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550001.

The product of its (nonzero) digits is 12, while the sum is 16.

Adding to 1311112120111 its reverse (1110212111131), we get a palindrome (2421324231242).

The spelling of 1311112120111 in words is "one trillion, three hundred eleven billion, one hundred twelve million, one hundred twenty thousand, one hundred eleven".