212011212111 has 4 divisors (see below), whose sum is σ = 282681616152. Its totient is φ = 141340808072.

The previous prime is 212011212053. The next prime is 212011212151. The reversal of 212011212111 is 111212110212.

It is a happy number.

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 212011212111 - 2¹⁴ = 212011195727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212011212151) 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, 35335202016 + ... + 35335202021.

It is an arithmetic number, because the mean of its divisors is an integer number (70670404038).

Almost surely, 2^212011212111 is an apocalyptic number.

212011212111 is a deficient number, since it is larger than the sum of its proper divisors (70670404041).

212011212111 is an equidigital number, since it uses as much as digits as its factorization.

212011212111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70670404040.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 212011212111 its reverse (111212110212), we get a palindrome (323223322323).

The spelling of 212011212111 in words is "two hundred twelve billion, eleven million, two hundred twelve thousand, one hundred eleven".