2111121211211 has 8 divisors (see below), whose sum is σ = 2111833648704. Its totient is φ = 2110408904520.

The previous prime is 2111121211207. The next prime is 2111121211219. The reversal of 2111121211211 is 1121121211112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2111121211211 - 2² = 2111121211207 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2111121211211.

It is not an unprimeable number, because it can be changed into a prime (2111121211219) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40088480 + ... + 40141106.

It is an arithmetic number, because the mean of its divisors is an integer number (263979206088).

Almost surely, 2^{2111121211211} is an apocalyptic number.

2111121211211 is a deficient number, since it is larger than the sum of its proper divisors (712437493).

2111121211211 is an equidigital number, since it uses as much as digits as its factorization.

2111121211211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65401.

The product of its digits is 16, while the sum is 17.

Adding to 2111121211211 its reverse (1121121211112), we get a palindrome (3232242422323).

Subtracting from 2111121211211 its reverse (1121121211112), we obtain a palindrome (990000000099).

The spelling of 2111121211211 in words is "two trillion, one hundred eleven billion, one hundred twenty-one million, two hundred eleven thousand, two hundred eleven".