121332353221 has 8 divisors (see below), whose sum is σ = 125520265080. Its totient is φ = 117144710592.

The previous prime is 121332353201. The next prime is 121332353239. The reversal of 121332353221 is 122353233121.

It can be written as a sum of positive squares in 4 ways, for example, as 76521390625 + 44810962596 = 276625^2 + 211686^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 121332353221 - 2²³ = 121323964613 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 121332353221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121332353201) 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, 1370331 + ... + 1456183.

It is an arithmetic number, because the mean of its divisors is an integer number (15690033135).

Almost surely, 2^121332353221 is an apocalyptic number.

It is an amenable number.

121332353221 is a deficient number, since it is larger than the sum of its proper divisors (4187911859).

121332353221 is an equidigital number, since it uses as much as digits as its factorization.

121332353221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134615.

The product of its digits is 6480, while the sum is 28.

Adding to 121332353221 its reverse (122353233121), we get a palindrome (243685586342).

The spelling of 121332353221 in words is "one hundred twenty-one billion, three hundred thirty-two million, three hundred fifty-three thousand, two hundred twenty-one".