1200111023111 has 32 divisors (see below), whose sum is σ = 1648810910208. Its totient is φ = 843141882240.

The previous prime is 1200111023107. The next prime is 1200111023113. The reversal of 1200111023111 is 1113201110021.

It is not a de Polignac number, because 1200111023111 - 2² = 1200111023107 is a prime.

It is a super-2 number, since 2×1200111023111² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200111023113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13897796 + ... + 13983881.

It is an arithmetic number, because the mean of its divisors is an integer number (51525340944).

Almost surely, 2^{1200111023111} is an apocalyptic number.

1200111023111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1200111023111 is a deficient number, since it is larger than the sum of its proper divisors (448699887097).

1200111023111 is a wasteful number, since it uses less digits than its factorization.

1200111023111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27881751.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 1200111023111 its reverse (1113201110021), we get a palindrome (2313312133132).

The spelling of 1200111023111 in words is "one trillion, two hundred billion, one hundred eleven million, twenty-three thousand, one hundred eleven".