211210211012111 has 4 divisors (see below), whose sum is σ = 216361679573424. Its totient is φ = 206058742450800.

The previous prime is 211210211012107. The next prime is 211210211012117. The reversal of 211210211012111 is 111210112012112.

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 211210211012111 - 2² = 211210211012107 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 211210211012111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211210211012117) 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, 2575734280595 + ... + 2575734280676.

It is an arithmetic number, because the mean of its divisors is an integer number (54090419893356).

Almost surely, 2^{211210211012111} is an apocalyptic number.

211210211012111 is a deficient number, since it is larger than the sum of its proper divisors (5151468561313).

211210211012111 is an equidigital number, since it uses as much as digits as its factorization.

211210211012111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5151468561312.

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

Adding to 211210211012111 its reverse (111210112012112), we get a palindrome (322420323024223).

The spelling of 211210211012111 in words is "two hundred eleven trillion, two hundred ten billion, two hundred eleven million, twelve thousand, one hundred eleven".