1321554341031 has 4 divisors (see below), whose sum is σ = 1762072454712. Its totient is φ = 881036227352.

The previous prime is 1321554341017. The next prime is 1321554341053. The reversal of 1321554341031 is 1301434551231.

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 1321554341031 - 2²² = 1321550146727 is a prime.

It is a super-2 number, since 2×1321554341031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321554340983 and 1321554341001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321554341071) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 220259056836 + ... + 220259056841.

It is an arithmetic number, because the mean of its divisors is an integer number (440518113678).

Almost surely, 2^{1321554341031} is an apocalyptic number.

1321554341031 is a deficient number, since it is larger than the sum of its proper divisors (440518113681).

1321554341031 is an equidigital number, since it uses as much as digits as its factorization.

1321554341031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440518113680.

The product of its (nonzero) digits is 21600, while the sum is 33.

Adding to 1321554341031 its reverse (1301434551231), we get a palindrome (2622988892262).

The spelling of 1321554341031 in words is "one trillion, three hundred twenty-one billion, five hundred fifty-four million, three hundred forty-one thousand, thirty-one".