1330220121221 has 4 divisors (see below), whose sum is σ = 1373130447744. Its totient is φ = 1287309794700.

The previous prime is 1330220121199. The next prime is 1330220121299. The reversal of 1330220121221 is 1221210220331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1330220121221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1330220121193 and 1330220121202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1330220121521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21455163215 + ... + 21455163276.

It is an arithmetic number, because the mean of its divisors is an integer number (343282611936).

Almost surely, 2^{1330220121221} is an apocalyptic number.

It is an amenable number.

1330220121221 is a deficient number, since it is larger than the sum of its proper divisors (42910326523).

1330220121221 is an equidigital number, since it uses as much as digits as its factorization.

1330220121221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42910326522.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1330220121221 its reverse (1221210220331), we get a palindrome (2551430341552).

The spelling of 1330220121221 in words is "one trillion, three hundred thirty billion, two hundred twenty million, one hundred twenty-one thousand, two hundred twenty-one".