1330212131221 has 8 divisors (see below), whose sum is σ = 1334283211800. Its totient is φ = 1326147133440.

The previous prime is 1330212131207. The next prime is 1330212131233. The reversal of 1330212131221 is 1221312120331.

It can be written as a sum of positive squares in 4 ways, for example, as 44514670225 + 1285697460996 = 210985^2 + 1133886^2 .

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 1330212131221 - 2⁷ = 1330212131093 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1330212131192 and 1330212131201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330212131291) 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, 1082470 + ... + 1957591.

It is an arithmetic number, because the mean of its divisors is an integer number (166785401475).

Almost surely, 2^{1330212131221} is an apocalyptic number.

It is an amenable number.

1330212131221 is a deficient number, since it is larger than the sum of its proper divisors (4071080579).

1330212131221 is an equidigital number, since it uses as much as digits as its factorization.

1330212131221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3041399.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1330212131221 its reverse (1221312120331), we get a palindrome (2551524251552).

The spelling of 1330212131221 in words is "one trillion, three hundred thirty billion, two hundred twelve million, one hundred thirty-one thousand, two hundred twenty-one".