121112210221 has 16 divisors (see below), whose sum is σ = 125729100288. Its totient is φ = 116540424000.

The previous prime is 121112210201. The next prime is 121112210281. The reversal of 121112210221 is 122012211121.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121112210221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121112210195 and 121112210204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121112210201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12227371 + ... + 12237271.

It is an arithmetic number, because the mean of its divisors is an integer number (7858068768).

Almost surely, 2^121112210221 is an apocalyptic number.

It is an amenable number.

121112210221 is a deficient number, since it is larger than the sum of its proper divisors (4616890067).

121112210221 is a wasteful number, since it uses less digits than its factorization.

121112210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12132.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 121112210221 its reverse (122012211121), we get a palindrome (243124421342).

The spelling of 121112210221 in words is "one hundred twenty-one billion, one hundred twelve million, two hundred ten thousand, two hundred twenty-one".