1200011111100 has 108 divisors (see below), whose sum is σ = 3841397405664. Its totient is φ = 313194378240.

The previous prime is 1200011111093. The next prime is 1200011111111. The reversal of 1200011111100 is 11111100021.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 14142229 + ... + 14226828.

Almost surely, 2^{1200011111100} is an apocalyptic number.

1200011111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1200011111100 is an abundant number, since it is smaller than the sum of its proper divisors (2641386294564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1200011111100 is a wasteful number, since it uses less digits than its factorization.

1200011111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28369124 (or 28369114 counting only the distinct ones).

The product of its (nonzero) digits is 2, while the sum is 9.

Adding to 1200011111100 its reverse (11111100021), we get a palindrome (1211122211121).

The spelling of 1200011111100 in words is "one trillion, two hundred billion, eleven million, one hundred eleven thousand, one hundred".