1321404534340 has 48 divisors (see below), whose sum is σ = 3030541081344. Its totient is φ = 479983212800.

The previous prime is 1321404534323. The next prime is 1321404534341. The reversal of 1321404534340 is 434354041231.

It is a super-2 number, since 2×1321404534340² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321404534296 and 1321404534305.

It is not an unprimeable number, because it can be changed into a prime (1321404534341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3096169 + ... + 3497008.

It is an arithmetic number, because the mean of its divisors is an integer number (63136272528).

Almost surely, 2^{1321404534340} is an apocalyptic number.

1321404534340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1321404534340 is an abundant number, since it is smaller than the sum of its proper divisors (1709136547004).

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

1321404534340 is a wasteful number, since it uses less digits than its factorization.

1321404534340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6594108 (or 6594106 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 34.

Adding to 1321404534340 its reverse (434354041231), we get a palindrome (1755758575571).

The spelling of 1321404534340 in words is "one trillion, three hundred twenty-one billion, four hundred four million, five hundred thirty-four thousand, three hundred forty".