121112111222001 has 32 divisors (see below), whose sum is σ = 179990838577280. Its totient is φ = 80487327630528.

The previous prime is 121112111221993. The next prime is 121112111222009. The reversal of 121112111222001 is 100222111211121.

It is a happy number.

121112111222001 is a `hidden beast` number, since 1 + 211 + 121 + 112 + 220 + 0 + 1 = 666.

121112111222001 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (121112111221993) and next prime (121112111222009).

It is not a de Polignac number, because 121112111222001 - 2³ = 121112111221993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121112111222009) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5763735 + ... + 16596531.

It is an arithmetic number, because the mean of its divisors is an integer number (5624713705540).

Almost surely, 2^{121112111222001} is an apocalyptic number.

It is an amenable number.

121112111222001 is a deficient number, since it is larger than the sum of its proper divisors (58878727355279).

121112111222001 is a wasteful number, since it uses less digits than its factorization.

121112111222001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10834110 (or 10834104 counting only the distinct ones).

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

Adding to 121112111222001 its reverse (100222111211121), we get a palindrome (221334222433122).

The spelling of 121112111222001 in words is "one hundred twenty-one trillion, one hundred twelve billion, one hundred eleven million, two hundred twenty-two thousand, one".