211112122212111 has 4 divisors (see below), whose sum is σ = 281482829616152. Its totient is φ = 140741414808072.

The previous prime is 211112122212053. The next prime is 211112122212139. The reversal of 211112122212111 is 111212221211112.

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

It is not a de Polignac number, because 211112122212111 - 2¹³ = 211112122203919 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 (211112122216111) 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, 35185353702016 + ... + 35185353702021.

It is an arithmetic number, because the mean of its divisors is an integer number (70370707404038).

Almost surely, 2^{211112122212111} is an apocalyptic number.

211112122212111 is a deficient number, since it is larger than the sum of its proper divisors (70370707404041).

211112122212111 is an equidigital number, since it uses as much as digits as its factorization.

211112122212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70370707404040.

The product of its digits is 64, while the sum is 21.

Adding to 211112122212111 its reverse (111212221211112), we get a palindrome (322324343423223).

The spelling of 211112122212111 in words is "two hundred eleven trillion, one hundred twelve billion, one hundred twenty-two million, two hundred twelve thousand, one hundred eleven".