1012100111111 has 16 divisors (see below), whose sum is σ = 1097116243968. Its totient is φ = 930899455200.

The previous prime is 1012100111047. The next prime is 1012100111117. The reversal of 1012100111111 is 1111110012101.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1012100111111 - 2⁶ = 1012100111047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1012100111092 and 1012100111101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1012100111117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4408745 + ... + 4632626.

It is an arithmetic number, because the mean of its divisors is an integer number (68569765248).

Almost surely, 2^{1012100111111} is an apocalyptic number.

1012100111111 is a deficient number, since it is larger than the sum of its proper divisors (85016132857).

1012100111111 is a wasteful number, since it uses less digits than its factorization.

1012100111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9041582.

The product of its (nonzero) digits is 2, while the sum is 11.

Adding to 1012100111111 its reverse (1111110012101), we get a palindrome (2123210123212).

It can be divided in two parts, 1012100 and 111111, that added together give a palindrome (1123211).

The spelling of 1012100111111 in words is "one trillion, twelve billion, one hundred million, one hundred eleven thousand, one hundred eleven".