2111021212211 has 4 divisors (see below), whose sum is σ = 2114811196992. Its totient is φ = 2107231227432.

The previous prime is 2111021212193. The next prime is 2111021212217. The reversal of 2111021212211 is 1122121201112.

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 2111021212211 - 2³⁸ = 1836143305267 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 2111021212211.

It is not an unprimeable number, because it can be changed into a prime (2111021212217) 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, 1894991555 + ... + 1894992668.

It is an arithmetic number, because the mean of its divisors is an integer number (528702799248).

Almost surely, 2^{2111021212211} is an apocalyptic number.

2111021212211 is a deficient number, since it is larger than the sum of its proper divisors (3789984781).

2111021212211 is an equidigital number, since it uses as much as digits as its factorization.

2111021212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3789984780.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 2111021212211 its reverse (1122121201112), we get a palindrome (3233142413323).

It can be divided in two parts, 2111021 and 212211, that added together give a palindrome (2323232).

The spelling of 2111021212211 in words is "two trillion, one hundred eleven billion, twenty-one million, two hundred twelve thousand, two hundred eleven".