1320421310340 has 48 divisors (see below), whose sum is σ = 4033286913600. Its totient is φ = 320102135680.

The previous prime is 1320421310267. The next prime is 1320421310353. The reversal of 1320421310340 is 430131240231.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1320421310340.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1000318515 + ... + 1000319834.

It is an arithmetic number, because the mean of its divisors is an integer number (84026810700).

Almost surely, 2^{1320421310340} is an apocalyptic number.

1320421310340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1320421310340 is an abundant number, since it is smaller than the sum of its proper divisors (2712865603260).

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

1320421310340 is a wasteful number, since it uses less digits than its factorization.

1320421310340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2000638372 (or 2000638370 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 1320421310340 its reverse (430131240231), we get a palindrome (1750552550571).

The spelling of 1320421310340 in words is "one trillion, three hundred twenty billion, four hundred twenty-one million, three hundred ten thousand, three hundred forty".