1321003303032 has 128 divisors (see below), whose sum is σ = 3859085721600. Its totient is φ = 368969155968.

The previous prime is 1321003303007. The next prime is 1321003303043. The reversal of 1321003303032 is 2303033001231.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6717319 + ... + 6911177.

It is an arithmetic number, because the mean of its divisors is an integer number (30149107200).

Almost surely, 2^{1321003303032} is an apocalyptic number.

1321003303032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1321003303032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1929542860800).

1321003303032 is an abundant number, since it is smaller than the sum of its proper divisors (2538082418568).

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

1321003303032 is a wasteful number, since it uses less digits than its factorization.

1321003303032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194785 (or 194781 counting only the distinct ones).

The product of its (nonzero) digits is 972, while the sum is 21.

Adding to 1321003303032 its reverse (2303033001231), we get a palindrome (3624036304263).

The spelling of 1321003303032 in words is "one trillion, three hundred twenty-one billion, three million, three hundred three thousand, thirty-two".