121002020100221 has 16 divisors (see below), whose sum is σ = 133340962767936. Its totient is φ = 109096115659776.

The previous prime is 121002020100191. The next prime is 121002020100229. The reversal of 121002020100221 is 122001020200121.

It is a de Polignac number, because none of the positive numbers 2^k-121002020100221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121002020100196 and 121002020100205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121002020100229) 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, 165027206 + ... + 165758808.

It is an arithmetic number, because the mean of its divisors is an integer number (8333810172996).

Almost surely, 2^{121002020100221} is an apocalyptic number.

It is an amenable number.

121002020100221 is a deficient number, since it is larger than the sum of its proper divisors (12338942667715).

121002020100221 is a wasteful number, since it uses less digits than its factorization.

121002020100221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1027532.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 121002020100221 its reverse (122001020200121), we get a palindrome (243003040300342).

The spelling of 121002020100221 in words is "one hundred twenty-one trillion, two billion, twenty million, one hundred thousand, two hundred twenty-one".