121304404221 has 32 divisors (see below), whose sum is σ = 217160337408. Its totient is φ = 58167944640.

The previous prime is 121304404217. The next prime is 121304404223. The reversal of 121304404221 is 122404403121.

It is not a de Polignac number, because 121304404221 - 2² = 121304404217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121304404191 and 121304404200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121304404223) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20194201 + ... + 20200206.

It is an arithmetic number, because the mean of its divisors is an integer number (6786260544).

Almost surely, 2^121304404221 is an apocalyptic number.

121304404221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121304404221 is a deficient number, since it is larger than the sum of its proper divisors (95855933187).

121304404221 is a wasteful number, since it uses less digits than its factorization.

121304404221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40394441.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 121304404221 its reverse (122404403121), we get a palindrome (243708807342).

It can be divided in two parts, 121304 and 404221, that added together give a palindrome (525525).

The spelling of 121304404221 in words is "one hundred twenty-one billion, three hundred four million, four hundred four thousand, two hundred twenty-one".