1200020211011 has 4 divisors (see below), whose sum is σ = 1200047137224. Its totient is φ = 1199993284800.

The previous prime is 1200020211007. The next prime is 1200020211031. The reversal of 1200020211011 is 1101120200021.

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 1200020211011 - 2² = 1200020211007 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200020210983 and 1200020211001.

It is not an unprimeable number, because it can be changed into a prime (1200020211031) 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, 13396145 + ... + 13485426.

It is an arithmetic number, because the mean of its divisors is an integer number (300011784306).

Almost surely, 2^{1200020211011} is an apocalyptic number.

1200020211011 is a deficient number, since it is larger than the sum of its proper divisors (26926213).

1200020211011 is an equidigital number, since it uses as much as digits as its factorization.

1200020211011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26926212.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1200020211011 its reverse (1101120200021), we get a palindrome (2301140411032).

The spelling of 1200020211011 in words is "one trillion, two hundred billion, twenty million, two hundred eleven thousand, eleven".