121112000021 has 8 divisors (see below), whose sum is σ = 122484908160. Its totient is φ = 119739360928.

The previous prime is 121111999993. The next prime is 121112000047. The reversal of 121112000021 is 120000211121.

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 121112000021 - 2²⁶ = 121044891157 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121111999966 and 121112000011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112008021) 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 7 ways as a sum of consecutive naturals, for example, 919700 + ... + 1043106.

It is an arithmetic number, because the mean of its divisors is an integer number (15310613520).

Almost surely, 2^121112000021 is an apocalyptic number.

It is an amenable number.

121112000021 is a deficient number, since it is larger than the sum of its proper divisors (1372908139).

121112000021 is a wasteful number, since it uses less digits than its factorization.

121112000021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134523.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 121112000021 its reverse (120000211121), we get a palindrome (241112211142).

The spelling of 121112000021 in words is "one hundred twenty-one billion, one hundred twelve million, twenty-one", and thus it is an aban number.