1321652402420 has 96 divisors (see below), whose sum is σ = 3232140226560. Its totient is φ = 444595536000.

The previous prime is 1321652402419. The next prime is 1321652402431. The reversal of 1321652402420 is 242042561231.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2073701 + ... + 2635059.

It is an arithmetic number, because the mean of its divisors is an integer number (33668127360).

Almost surely, 2^{1321652402420} is an apocalyptic number.

1321652402420 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 1321652402420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1616070113280).

1321652402420 is an abundant number, since it is smaller than the sum of its proper divisors (1910487824140).

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

1321652402420 is a wasteful number, since it uses less digits than its factorization.

1321652402420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 561693 (or 561691 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 1321652402420 its reverse (242042561231), we get a palindrome (1563694963651).

The spelling of 1321652402420 in words is "one trillion, three hundred twenty-one billion, six hundred fifty-two million, four hundred two thousand, four hundred twenty".