2001200111100 has 108 divisors (see below), whose sum is σ = 6308909157096. Its totient is φ = 530568620160.

The previous prime is 2001200111089. The next prime is 2001200111101. The reversal of 2001200111100 is 11110021002.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001200111101) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 6270762 + ... + 6582161.

Almost surely, 2^{2001200111100} is an apocalyptic number.

2001200111100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2001200111100 is an abundant number, since it is smaller than the sum of its proper divisors (4307709045996).

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

2001200111100 is a wasteful number, since it uses less digits than its factorization.

2001200111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12853116 (or 12853106 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 2001200111100 its reverse (11110021002), we get a palindrome (2012310132102).

The spelling of 2001200111100 in words is "two trillion, one billion, two hundred million, one hundred eleven thousand, one hundred".