212221112112111 has 8 divisors (see below), whose sum is σ = 282961587725824. Its totient is φ = 141480688953240.

The previous prime is 212221112112077. The next prime is 212221112112167. The reversal of 212221112112111 is 111211211122212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 212221112112111 - 2⁹ = 212221112111599 is a prime.

It is a super-2 number, since 2×212221112112111² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212221112112011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2430145 + ... + 20744826.

It is an arithmetic number, because the mean of its divisors is an integer number (35370198465728).

Almost surely, 2^{212221112112111} is an apocalyptic number.

212221112112111 is a deficient number, since it is larger than the sum of its proper divisors (70740475613713).

212221112112111 is a wasteful number, since it uses less digits than its factorization.

212221112112111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26227421.

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

Adding to 212221112112111 its reverse (111211211122212), we get a palindrome (323432323234323).

The spelling of 212221112112111 in words is "two hundred twelve trillion, two hundred twenty-one billion, one hundred twelve million, one hundred twelve thousand, one hundred eleven".