111120212120121 has 96 divisors (see below), whose sum is σ = 169397590602240. Its totient is φ = 70133278574592.

The previous prime is 111120212120117. The next prime is 111120212120123. The reversal of 111120212120121 is 121021212021111.

It is a happy number.

111120212120121 is a `hidden beast` number, since 111 + 120 + 212 + 1 + 201 + 21 = 666.

It is not a de Polignac number, because 111120212120121 - 2² = 111120212120117 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111120212120094 and 111120212120103.

It is not an unprimeable number, because it can be changed into a prime (111120212120123) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 350966875 + ... + 351283343.

It is an arithmetic number, because the mean of its divisors is an integer number (1764558235440).

Almost surely, 2^{111120212120121} is an apocalyptic number.

It is an amenable number.

111120212120121 is a deficient number, since it is larger than the sum of its proper divisors (58277378482119).

111120212120121 is a wasteful number, since it uses less digits than its factorization.

111120212120121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 316815 (or 316812 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111120212120121 its reverse (121021212021111), we get a palindrome (232141424141232).

The spelling of 111120212120121 in words is "one hundred eleven trillion, one hundred twenty billion, two hundred twelve million, one hundred twenty thousand, one hundred twenty-one".