1200011020111 has 4 divisors (see below), whose sum is σ = 1200021815632. Its totient is φ = 1200000224592.

The previous prime is 1200011020099. The next prime is 1200011020139. The reversal of 1200011020111 is 1110201100021.

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 1200011020111 - 2²⁵ = 1199977465679 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 (1200011020211) 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, 5229270 + ... + 5453923.

It is an arithmetic number, because the mean of its divisors is an integer number (300005453908).

Almost surely, 2^{1200011020111} is an apocalyptic number.

1200011020111 is a deficient number, since it is larger than the sum of its proper divisors (10795521).

1200011020111 is a wasteful number, since it uses less digits than its factorization.

1200011020111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10795520.

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 1200011020111 its reverse (1110201100021), we get a palindrome (2310212120132).

The spelling of 1200011020111 in words is "one trillion, two hundred billion, eleven million, twenty thousand, one hundred eleven".