1121201211211 has 4 divisors (see below), whose sum is σ = 1121411454912. Its totient is φ = 1120990967512.

The previous prime is 1121201211161. The next prime is 1121201211241. The reversal of 1121201211211 is 1121121021211.

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 1121201211211 - 2¹⁹ = 1121200686923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121201211241) 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, 105113851 + ... + 105124516.

It is an arithmetic number, because the mean of its divisors is an integer number (280352863728).

Almost surely, 2^{1121201211211} is an apocalyptic number.

1121201211211 is a deficient number, since it is larger than the sum of its proper divisors (210243701).

1121201211211 is an equidigital number, since it uses as much as digits as its factorization.

1121201211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210243700.

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 1121201211211 its reverse (1121121021211), we get a palindrome (2242322232422).

The spelling of 1121201211211 in words is "one trillion, one hundred twenty-one billion, two hundred one million, two hundred eleven thousand, two hundred eleven".