121112210211111 has 96 divisors (see below), whose sum is σ = 207013777338368. Its totient is φ = 66769175784960.

The previous prime is 121112210211053. The next prime is 121112210211281. The reversal of 121112210211111 is 111112012211121.

121112210211111 is a `hidden beast` number, since 1 + 21 + 112 + 210 + 211 + 111 = 666.

It is not a de Polignac number, because 121112210211111 - 2⁷ = 121112210210983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112210211011) 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 95 ways as a sum of consecutive naturals, for example, 1971934875 + ... + 1971996291.

Almost surely, 2^{121112210211111} is an apocalyptic number.

121112210211111 is a deficient number, since it is larger than the sum of its proper divisors (85901567127257).

121112210211111 is a wasteful number, since it uses less digits than its factorization.

121112210211111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64541 (or 64538 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 121112210211111 its reverse (111112012211121), we get a palindrome (232224222422232).

The spelling of 121112210211111 in words is "one hundred twenty-one trillion, one hundred twelve billion, two hundred ten million, two hundred eleven thousand, one hundred eleven".