2211201121211 has 4 divisors (see below), whose sum is σ = 2222778090624. Its totient is φ = 2199624151800.

The previous prime is 2211201121187. The next prime is 2211201121229. The reversal of 2211201121211 is 1121211021122.

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 2211201121211 - 2¹⁰ = 2211201120187 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 2211201121211.

It is not an unprimeable number, because it can be changed into a prime (2211201121231) 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, 5788484420 + ... + 5788484801.

It is an arithmetic number, because the mean of its divisors is an integer number (555694522656).

Almost surely, 2^{2211201121211} is an apocalyptic number.

2211201121211 is a deficient number, since it is larger than the sum of its proper divisors (11576969413).

2211201121211 is a wasteful number, since it uses less digits than its factorization.

2211201121211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11576969412.

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

Adding to 2211201121211 its reverse (1121211021122), we get a palindrome (3332412142333).

The spelling of 2211201121211 in words is "two trillion, two hundred eleven billion, two hundred one million, one hundred twenty-one thousand, two hundred eleven".