1321350223240 has 32 divisors (see below), whose sum is σ = 3147922592280. Its totient is φ = 497449495552.

The previous prime is 1321350223213. The next prime is 1321350223243. The reversal of 1321350223240 is 423220531231.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1321180129476 + 170093764 = 1149426^2 + 13042^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1321350223199 and 1321350223208.

It is not an unprimeable number, because it can be changed into a prime (1321350223243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 971580367 + ... + 971581726.

Almost surely, 2^{1321350223240} is an apocalyptic number.

1321350223240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321350223240 is an abundant number, since it is smaller than the sum of its proper divisors (1826572369040).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1321350223240 is a wasteful number, since it uses less digits than its factorization.

1321350223240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1943162121 (or 1943162117 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 28.

Adding to 1321350223240 its reverse (423220531231), we get a palindrome (1744570754471).

The spelling of 1321350223240 in words is "one trillion, three hundred twenty-one billion, three hundred fifty million, two hundred twenty-three thousand, two hundred forty".