1320121301320 has 128 divisors (see below), whose sum is σ = 3059441007840. Its totient is φ = 512344719360.

The previous prime is 1320121301273. The next prime is 1320121301333. The reversal of 1320121301320 is 231031210231.

It can be written as a sum of positive squares in 16 ways, for example, as 384293367396 + 935827933924 = 619914^2 + 967382^2 .

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, 308942704 + ... + 308946976.

Almost surely, 2^{1320121301320} is an apocalyptic number.

1320121301320 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 1320121301320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1529720503920).

1320121301320 is an abundant number, since it is smaller than the sum of its proper divisors (1739319706520).

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

1320121301320 is a wasteful number, since it uses less digits than its factorization.

1320121301320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5315 (or 5311 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1320121301320 its reverse (231031210231), we get a palindrome (1551152511551).

The spelling of 1320121301320 in words is "one trillion, three hundred twenty billion, one hundred twenty-one million, three hundred one thousand, three hundred twenty".