121122001220221 has 16 divisors (see below), whose sum is σ = 124323278587200. Its totient is φ = 117959324537088.

The previous prime is 121122001220197. The next prime is 121122001220237. The reversal of 121122001220221 is 122022100221121.

It is a cyclic number.

It is not a de Polignac number, because 121122001220221 - 2⁵ = 121122001220189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121122005220221) 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, 42365845 + ... + 45134341.

It is an arithmetic number, because the mean of its divisors is an integer number (7770204911700).

Almost surely, 2^{121122001220221} is an apocalyptic number.

It is an amenable number.

121122001220221 is a deficient number, since it is larger than the sum of its proper divisors (3201277366979).

121122001220221 is a wasteful number, since it uses less digits than its factorization.

121122001220221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775468.

The product of its (nonzero) digits is 128, while the sum is 19.

Adding to 121122001220221 its reverse (122022100221121), we get a palindrome (243144101441342).

The spelling of 121122001220221 in words is "one hundred twenty-one trillion, one hundred twenty-two billion, one million, two hundred twenty thousand, two hundred twenty-one".