1200100112001 has 24 divisors (see below), whose sum is σ = 1981168227584. Its totient is φ = 685753983360.

The previous prime is 1200100111981. The next prime is 1200100112017. The reversal of 1200100112001 is 1002110010021.

It is a happy number.

It is not a de Polignac number, because 1200100112001 - 2⁹ = 1200100111489 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1200100112021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2484840 + ... + 2928246.

Almost surely, 2^{1200100112001} is an apocalyptic number.

It is an amenable number.

1200100112001 is a deficient number, since it is larger than the sum of its proper divisors (781068115583).

1200100112001 is a wasteful number, since it uses less digits than its factorization.

1200100112001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486381 (or 486378 counting only the distinct ones).

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

Adding to 1200100112001 its reverse (1002110010021), we get a palindrome (2202210122022).

The spelling of 1200100112001 in words is "one trillion, two hundred billion, one hundred million, one hundred twelve thousand, one".