121213233302221 has 16 divisors (see below), whose sum is σ = 121473680140800. Its totient is φ = 120953087956800.

The previous prime is 121213233302207. The next prime is 121213233302251. The reversal of 121213233302221 is 122203332312121.

It is a cyclic number.

It is not a de Polignac number, because 121213233302221 - 2³¹ = 121211085818573 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 121213233302221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121213233302251) 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, 11656234180 + ... + 11656244578.

It is an arithmetic number, because the mean of its divisors is an integer number (7592105008800).

Almost surely, 2^{121213233302221} is an apocalyptic number.

It is an amenable number.

121213233302221 is a deficient number, since it is larger than the sum of its proper divisors (260446838579).

121213233302221 is a wasteful number, since it uses less digits than its factorization.

121213233302221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22596.

The product of its (nonzero) digits is 5184, while the sum is 28.

Adding to 121213233302221 its reverse (122203332312121), we get a palindrome (243416565614342).

The spelling of 121213233302221 in words is "one hundred twenty-one trillion, two hundred thirteen billion, two hundred thirty-three million, three hundred two thousand, two hundred twenty-one".