12121231330321 has 32 divisors (see below), whose sum is σ = 13027469760000. Its totient is φ = 11256288755712.

The previous prime is 12121231330303. The next prime is 12121231330333. The reversal of 12121231330321 is 12303313212121.

It is not a de Polignac number, because 12121231330321 - 2⁴³ = 3325138308113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12121231330121) 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, 252244105 + ... + 252292153.

It is an arithmetic number, because the mean of its divisors is an integer number (407108430000).

Almost surely, 2^{12121231330321} is an apocalyptic number.

It is an amenable number.

12121231330321 is a deficient number, since it is larger than the sum of its proper divisors (906238429679).

12121231330321 is a wasteful number, since it uses less digits than its factorization.

12121231330321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51321.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 12121231330321 its reverse (12303313212121), we get a palindrome (24424544542442).

The spelling of 12121231330321 in words is "twelve trillion, one hundred twenty-one billion, two hundred thirty-one million, three hundred thirty thousand, three hundred twenty-one".