121112111200221 has 12 divisors (see below), whose sum is σ = 182545790794848. Its totient is φ = 77230911489864.

The previous prime is 121112111200181. The next prime is 121112111200279. The reversal of 121112111200221 is 122002111211121.

It is a happy number.

121112111200221 is a `hidden beast` number, since 1 + 2 + 111 + 211 + 120 + 0 + 221 = 666.

It is not a de Polignac number, because 121112111200221 - 2²⁹ = 121111574329309 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121112111200194 and 121112111200203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112111200921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 292541331195 + ... + 292541331608.

It is an arithmetic number, because the mean of its divisors is an integer number (15212149232904).

Almost surely, 2^{121112111200221} is an apocalyptic number.

It is an amenable number.

121112111200221 is a deficient number, since it is larger than the sum of its proper divisors (61433679594627).

121112111200221 is a wasteful number, since it uses less digits than its factorization.

121112111200221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585082662832 (or 585082662829 counting only the distinct ones).

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

Adding to 121112111200221 its reverse (122002111211121), we get a palindrome (243114222411342).

The spelling of 121112111200221 in words is "one hundred twenty-one trillion, one hundred twelve billion, one hundred eleven million, two hundred thousand, two hundred twenty-one".