211122002111 has 4 divisors (see below), whose sum is σ = 211128689424. Its totient is φ = 211115314800.

The previous prime is 211122002093. The next prime is 211122002149. The reversal of 211122002111 is 111200221112.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211122002111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211122002411) 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, 3296075 + ... + 3359516.

It is an arithmetic number, because the mean of its divisors is an integer number (52782172356).

Almost surely, 2^211122002111 is an apocalyptic number.

211122002111 is a deficient number, since it is larger than the sum of its proper divisors (6687313).

211122002111 is an equidigital number, since it uses as much as digits as its factorization.

211122002111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6687312.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211122002111 its reverse (111200221112), we get a palindrome (322322223223).

The spelling of 211122002111 in words is "two hundred eleven billion, one hundred twenty-two million, two thousand, one hundred eleven".