1201200100011 has 32 divisors (see below), whose sum is σ = 1809969696000. Its totient is φ = 787117552704.

The previous prime is 1201200099991. The next prime is 1201200100027. The reversal of 1201200100011 is 1100010021021.

It is a happy number.

It is not a de Polignac number, because 1201200100011 - 2¹⁸ = 1201199837867 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 1201200099966 and 1201200100002.

It is not an unprimeable number, because it can be changed into a prime (1201200100511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12301900 + ... + 12399158.

It is an arithmetic number, because the mean of its divisors is an integer number (56561553000).

Almost surely, 2^{1201200100011} is an apocalyptic number.

1201200100011 is a deficient number, since it is larger than the sum of its proper divisors (608769595989).

1201200100011 is an equidigital number, since it uses as much as digits as its factorization.

1201200100011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105080 (or 105074 counting only the distinct ones).

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

Adding to 1201200100011 its reverse (1100010021021), we get a palindrome (2301210121032).

The spelling of 1201200100011 in words is "one trillion, two hundred one billion, two hundred million, one hundred thousand, eleven".