1321220302112 has 12 divisors (see below), whose sum is σ = 2601152469846. Its totient is φ = 660610151040.

The previous prime is 1321220302009. The next prime is 1321220302159. The reversal of 1321220302112 is 2112030221231.

It can be written as a sum of positive squares in only one way, i.e., 734592983056 + 586627319056 = 857084^2 + 765916^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20644067189 + ... + 20644067252.

Almost surely, 2^{1321220302112} is an apocalyptic number.

It is an amenable number.

1321220302112 is a deficient number, since it is larger than the sum of its proper divisors (1279932167734).

1321220302112 is an equidigital number, since it uses as much as digits as its factorization.

1321220302112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41288134451 (or 41288134443 counting only the distinct ones).

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

Adding to 1321220302112 its reverse (2112030221231), we get a palindrome (3433250523343).

The spelling of 1321220302112 in words is "one trillion, three hundred twenty-one billion, two hundred twenty million, three hundred two thousand, one hundred twelve".