1321201223000 has 64 divisors (see below), whose sum is σ = 3273470366400. Its totient is φ = 497393395200.

The previous prime is 1321201222961. The next prime is 1321201223003. The reversal of 1321201223000 is 3221021231.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a self number, because there is not a number n which added to its sum of digits gives 1321201223000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321201223003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38841860 + ... + 38875859.

It is an arithmetic number, because the mean of its divisors is an integer number (51147974475).

Almost surely, 2^{1321201223000} is an apocalyptic number.

1321201223000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321201223000 is an abundant number, since it is smaller than the sum of its proper divisors (1952269143400).

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

1321201223000 is a wasteful number, since it uses less digits than its factorization.

1321201223000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77717757 (or 77717743 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 1321201223000 its reverse (3221021231), we get a palindrome (1324422244231).

The spelling of 1321201223000 in words is "one trillion, three hundred twenty-one billion, two hundred one million, two hundred twenty-three thousand".