1321362530531 has 4 divisors (see below), whose sum is σ = 1321846726200. Its totient is φ = 1320878334864.

The previous prime is 1321362530503. The next prime is 1321362530549. The reversal of 1321362530531 is 1350352631231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1321362530531 - 2²² = 1321358336227 is a prime.

It is a super-2 number, since 2×1321362530531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321362530491 and 1321362530500.

It is not an unprimeable number, because it can be changed into a prime (1321362535531) 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 3 ways as a sum of consecutive naturals, for example, 242093741 + ... + 242099198.

It is an arithmetic number, because the mean of its divisors is an integer number (330461681550).

Almost surely, 2^{1321362530531} is an apocalyptic number.

1321362530531 is a deficient number, since it is larger than the sum of its proper divisors (484195669).

1321362530531 is an equidigital number, since it uses as much as digits as its factorization.

1321362530531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484195668.

The product of its (nonzero) digits is 48600, while the sum is 35.

The spelling of 1321362530531 in words is "one trillion, three hundred twenty-one billion, three hundred sixty-two million, five hundred thirty thousand, five hundred thirty-one".