1121111111111 has 8 divisors (see below), whose sum is σ = 1132691822784. Its totient is φ = 1109539823200.

The previous prime is 1121111111023. The next prime is 1121111111167. The reversal of 1121111111111 is 1111111111211.

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 1121111111111 - 2¹⁸ = 1121110848967 is a prime.

It is a Duffinian number.

1121111111111 is a modest number, since divided by 1111111 gives 112111 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1121111111311) 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, 2116655 + ... + 2592768.

It is an arithmetic number, because the mean of its divisors is an integer number (141586477848).

Almost surely, 2^{1121111111111} is an apocalyptic number.

1121111111111 is a deficient number, since it is larger than the sum of its proper divisors (11580711673).

1121111111111 is a wasteful number, since it uses less digits than its factorization.

1121111111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4711881.

The product of its digits is 2, while the sum is 14.

Adding to 1121111111111 its reverse (1111111111211), we get a palindrome (2232222222322).

It can be divided in two parts, 11211 and 11111111, that multiplied together give a palindrome (124566665421).

The spelling of 1121111111111 in words is "one trillion, one hundred twenty-one billion, one hundred eleven million, one hundred eleven thousand, one hundred eleven".