121111200121 has 8 divisors (see below), whose sum is σ = 122828007744. Its totient is φ = 119394698640.

The previous prime is 121111200113. The next prime is 121111200163. The reversal of 121111200121 is 121002111121.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 121111200121 - 2³ = 121111200113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121111200101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 789151 + ... + 930043.

It is an arithmetic number, because the mean of its divisors is an integer number (15353500968).

Almost surely, 2^121111200121 is an apocalyptic number.

It is an amenable number.

121111200121 is a deficient number, since it is larger than the sum of its proper divisors (1716807623).

121111200121 is a wasteful number, since it uses less digits than its factorization.

121111200121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153071.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 121111200121 its reverse (121002111121), we get a palindrome (242113311242).

The spelling of 121111200121 in words is "one hundred twenty-one billion, one hundred eleven million, two hundred thousand, one hundred twenty-one".