11111001002100 has 108 divisors (see below), whose sum is σ = 34831938939616. Its totient is φ = 2962497706560.

The previous prime is 11111001002089. The next prime is 11111001002117. The reversal of 11111001002100 is 120010011111.

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, 5235999 + ... + 7045401.

Almost surely, 2^{11111001002100} is an apocalyptic number.

11111001002100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11111001002100 is an abundant number, since it is smaller than the sum of its proper divisors (23720937937516).

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

11111001002100 is a wasteful number, since it uses less digits than its factorization.

11111001002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1816246 (or 1816236 counting only the distinct ones).

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

Adding to 11111001002100 its reverse (120010011111), we get a palindrome (11231011013211).

The spelling of 11111001002100 in words is "eleven trillion, one hundred eleven billion, one million, two thousand, one hundred".