1200001201103 has 4 divisors (see below), whose sum is σ = 1225533141600. Its totient is φ = 1174469260608.

The previous prime is 1200001201073. The next prime is 1200001201153. The reversal of 1200001201103 is 3011021000021.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1200001201103 - 2⁶ = 1200001201039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200001201153) 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 3 ways as a sum of consecutive naturals, for example, 12765970178 + ... + 12765970271.

It is an arithmetic number, because the mean of its divisors is an integer number (306383285400).

Almost surely, 2^{1200001201103} is an apocalyptic number.

1200001201103 is a deficient number, since it is larger than the sum of its proper divisors (25531940497).

1200001201103 is an equidigital number, since it uses as much as digits as its factorization.

1200001201103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25531940496.

The product of its (nonzero) digits is 12, while the sum is 11.

Adding to 1200001201103 its reverse (3011021000021), we get a palindrome (4211022201124).

The spelling of 1200001201103 in words is "one trillion, two hundred billion, one million, two hundred one thousand, one hundred three".