1320221322240 has 176 divisors, whose sum is σ = 4264458766560. Its totient is φ = 348572876800.

The previous prime is 1320221322223. The next prime is 1320221322247. The reversal of 1320221322240 is 422231220231.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1320221322240.

It is not an unprimeable number, because it can be changed into a prime (1320221322247) 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, 1125856 + ... + 1976864.

Almost surely, 2^{1320221322240} is an apocalyptic number.

1320221322240 is a gapful number since it is divisible by the number (10) 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 1320221322240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2132229383280).

1320221322240 is an abundant number, since it is smaller than the sum of its proper divisors (2944237444320).

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

1320221322240 is a wasteful number, since it uses less digits than its factorization.

1320221322240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851138 (or 851120 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 1320221322240 its reverse (422231220231), we get a palindrome (1742452542471).

It can be divided in two parts, 1320221 and 322240, that added together give a palindrome (1642461).

The spelling of 1320221322240 in words is "one trillion, three hundred twenty billion, two hundred twenty-one million, three hundred twenty-two thousand, two hundred forty".