1321203303330 has 128 divisors (see below), whose sum is σ = 3239286515712. Its totient is φ = 344803200000.

The previous prime is 1321203303317. The next prime is 1321203303347. The reversal of 1321203303330 is 333033021231.

It is a self number, because there is not a number n which added to its sum of digits gives 1321203303330.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 180217765 + ... + 180225095.

It is an arithmetic number, because the mean of its divisors is an integer number (25306925904).

Almost surely, 2^{1321203303330} is an apocalyptic number.

1321203303330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321203303330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1619643257856).

1321203303330 is an abundant number, since it is smaller than the sum of its proper divisors (1918083212382).

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

1321203303330 is a wasteful number, since it uses less digits than its factorization.

1321203303330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8024.

The product of its (nonzero) digits is 2916, while the sum is 24.

Adding to 1321203303330 its reverse (333033021231), we get a palindrome (1654236324561).

The spelling of 1321203303330 in words is "one trillion, three hundred twenty-one billion, two hundred three million, three hundred three thousand, three hundred thirty".