1200100312011 has 4 divisors (see below), whose sum is σ = 1600133749352. Its totient is φ = 800066874672.

The previous prime is 1200100312003. The next prime is 1200100312013. The reversal of 1200100312011 is 1102130010021.

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

It is not a de Polignac number, because 1200100312011 - 2³ = 1200100312003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1200100312013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200016718666 + ... + 200016718671.

It is an arithmetic number, because the mean of its divisors is an integer number (400033437338).

Almost surely, 2^{1200100312011} is an apocalyptic number.

1200100312011 is a deficient number, since it is larger than the sum of its proper divisors (400033437341).

1200100312011 is an equidigital number, since it uses as much as digits as its factorization.

1200100312011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400033437340.

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

Adding to 1200100312011 its reverse (1102130010021), we get a palindrome (2302230322032).

The spelling of 1200100312011 in words is "one trillion, two hundred billion, one hundred million, three hundred twelve thousand, eleven".