10111111111111 has 4 divisors (see below), whose sum is σ = 10112930643592. Its totient is φ = 10109291578632.

The previous prime is 10111111111103. The next prime is 10111111111117. The reversal of 10111111111111 is 11111111111101.

It is a happy number.

10111111111111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 10111111111111 - 2³ = 10111111111103 is a prime.

It is a Duffinian number.

10111111111111 is a modest number, since divided by 1111111 gives 1011111 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 10111111111091 and 10111111111100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10111111111117) 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, 909757905 + ... + 909769018.

It is an arithmetic number, because the mean of its divisors is an integer number (2528232660898).

Almost surely, 2^{10111111111111} is an apocalyptic number.

10111111111111 is a deficient number, since it is larger than the sum of its proper divisors (1819532481).

10111111111111 is an equidigital number, since it uses as much as digits as its factorization.

10111111111111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819532480.

The product of its (nonzero) digits is 1, while the sum is 13.

Adding to 10111111111111 its reverse (11111111111101), we get a palindrome (21222222222212).

It can be divided in two parts, 101 and 11111111111, that multiplied together give a palindrome (1122222222211).

The spelling of 10111111111111 in words is "ten trillion, one hundred eleven billion, one hundred eleven million, one hundred eleven thousand, one hundred eleven".