1011200111100 has 108 divisors (see below), whose sum is σ = 3173242810920. Its totient is φ = 269339241600.

The previous prime is 1011200111099. The next prime is 1011200111111. The reversal of 1011200111100 is 11110021101.

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, 119110 + ... + 1427090.

Almost surely, 2^{1011200111100} is an apocalyptic number.

1011200111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1011200111100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1586621405460).

1011200111100 is an abundant number, since it is smaller than the sum of its proper divisors (2162042699820).

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

1011200111100 is a wasteful number, since it uses less digits than its factorization.

1011200111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308860 (or 1308850 counting only the distinct ones).

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

Adding to 1011200111100 its reverse (11110021101), we get a palindrome (1022310132201).

The spelling of 1011200111100 in words is "one trillion, eleven billion, two hundred million, one hundred eleven thousand, one hundred".