1200100111111 has 32 divisors (see below), whose sum is σ = 1400683415040. Its totient is φ = 1016151628800.

The previous prime is 1200100111039. The next prime is 1200100111127. The reversal of 1200100111111 is 1111110010021.

It is not a de Polignac number, because 1200100111111 - 2³⁷ = 1062661157639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200100111411) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8009595 + ... + 8158051.

It is an arithmetic number, because the mean of its divisors is an integer number (43771356720).

Almost surely, 2^{1200100111111} is an apocalyptic number.

1200100111111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1200100111111 is a deficient number, since it is larger than the sum of its proper divisors (200583303929).

1200100111111 is a wasteful number, since it uses less digits than its factorization.

1200100111111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148935.

The product of its (nonzero) digits is 2, while the sum is 10.

Adding to 1200100111111 its reverse (1111110010021), we get a palindrome (2311210121132).

The spelling of 1200100111111 in words is "one trillion, two hundred billion, one hundred million, one hundred eleven thousand, one hundred eleven".