1111101211111 has 4 divisors (see below), whose sum is σ = 1111105500400. Its totient is φ = 1111096921824.

The previous prime is 1111101211091. The next prime is 1111101211151. The reversal of 1111101211111 is 1111121011111.

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 1111101211111 - 2²⁵ = 1111067656679 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111101211091 and 1111101211100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111101211151) 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, 1729266 + ... + 2283103.

It is an arithmetic number, because the mean of its divisors is an integer number (277776375100).

Almost surely, 2^{1111101211111} is an apocalyptic number.

1111101211111 is a deficient number, since it is larger than the sum of its proper divisors (4289289).

1111101211111 is an equidigital number, since it uses as much as digits as its factorization.

1111101211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289288.

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

Adding to 1111101211111 its reverse (1111121011111), we get a palindrome (2222222222222).

The spelling of 1111101211111 in words is "one trillion, one hundred eleven billion, one hundred one million, two hundred eleven thousand, one hundred eleven".