212120110110111 has 16 divisors (see below), whose sum is σ = 323236232352000. Its totient is φ = 121209395851008.

The previous prime is 212120110110049. The next prime is 212120110110133. The reversal of 212120110110111 is 111011011021212.

It is not a de Polignac number, because 212120110110111 - 2⁶ = 212120110110047 is a prime.

It is a super-2 number, since 2×212120110110111² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212120110110211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86074386 + ... + 88504463.

It is an arithmetic number, because the mean of its divisors is an integer number (20202264522000).

Almost surely, 2^{212120110110111} is an apocalyptic number.

212120110110111 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

212120110110111 is a deficient number, since it is larger than the sum of its proper divisors (111116122241889).

212120110110111 is a wasteful number, since it uses less digits than its factorization.

212120110110111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174636718.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 212120110110111 its reverse (111011011021212), we get a palindrome (323131121131323).

The spelling of 212120110110111 in words is "two hundred twelve trillion, one hundred twenty billion, one hundred ten million, one hundred ten thousand, one hundred eleven".