1321002031322 has 4 divisors (see below), whose sum is σ = 1981503046986. Its totient is φ = 660501015660.

The previous prime is 1321002031313. The next prime is 1321002031369. The reversal of 1321002031322 is 2231302001231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 1183049957761 + 137952073561 = 1087681^2 + 371419^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1321002031294 and 1321002031303.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 330250507829 + ... + 330250507832.

Almost surely, 2^{1321002031322} is an apocalyptic number.

1321002031322 is a deficient number, since it is larger than the sum of its proper divisors (660501015664).

1321002031322 is an equidigital number, since it uses as much as digits as its factorization.

1321002031322 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660501015663.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 1321002031322 its reverse (2231302001231), we get a palindrome (3552304032553).

The spelling of 1321002031322 in words is "one trillion, three hundred twenty-one billion, two million, thirty-one thousand, three hundred twenty-two".