1111111201111 has 4 divisors (see below), whose sum is σ = 1159420383792. Its totient is φ = 1062802018432.

The previous prime is 1111111201069. The next prime is 1111111201129. The reversal of 1111111201111 is 1111021111111.

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

It is a cyclic number.

It is not a de Polignac number, because 1111111201111 - 2¹⁷ = 1111111070039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1111111201091 and 1111111201100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111111201181) 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, 24154591306 + ... + 24154591351.

It is an arithmetic number, because the mean of its divisors is an integer number (289855095948).

Almost surely, 2^{1111111201111} is an apocalyptic number.

1111111201111 is a deficient number, since it is larger than the sum of its proper divisors (48309182681).

1111111201111 is an equidigital number, since it uses as much as digits as its factorization.

1111111201111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48309182680.

The product of its (nonzero) digits is 2, while the sum is 13.

Adding to 1111111201111 its reverse (1111021111111), we get a palindrome (2222132312222).

The spelling of 1111111201111 in words is "one trillion, one hundred eleven billion, one hundred eleven million, two hundred one thousand, one hundred eleven".