121330312221 has 8 divisors (see below), whose sum is σ = 161799303424. Its totient is φ = 80874097920.

The previous prime is 121330312219. The next prime is 121330312249. The reversal of 121330312221 is 122213033121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 121330312221 - 2¹ = 121330312219 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 (121330312021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3172045 + ... + 3210066.

It is an arithmetic number, because the mean of its divisors is an integer number (20224912928).

Almost surely, 2^121330312221 is an apocalyptic number.

It is an amenable number.

121330312221 is a deficient number, since it is larger than the sum of its proper divisors (40468991203).

121330312221 is an equidigital number, since it uses as much as digits as its factorization.

121330312221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6388451.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 121330312221 its reverse (122213033121), we get a palindrome (243543345342).

The spelling of 121330312221 in words is "one hundred twenty-one billion, three hundred thirty million, three hundred twelve thousand, two hundred twenty-one".