1321152644517 has 4 divisors (see below), whose sum is σ = 1761536859360. Its totient is φ = 880768429676.

The previous prime is 1321152644501. The next prime is 1321152644519. The reversal of 1321152644517 is 7154462511231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1321152644517 - 2⁴ = 1321152644501 is a prime.

It is a super-2 number, since 2×1321152644517² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321152644519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 220192107417 + ... + 220192107422.

It is an arithmetic number, because the mean of its divisors is an integer number (440384214840).

Almost surely, 2^{1321152644517} is an apocalyptic number.

It is an amenable number.

1321152644517 is a deficient number, since it is larger than the sum of its proper divisors (440384214843).

1321152644517 is an equidigital number, since it uses as much as digits as its factorization.

1321152644517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440384214842.

The product of its digits is 201600, while the sum is 42.

The spelling of 1321152644517 in words is "one trillion, three hundred twenty-one billion, one hundred fifty-two million, six hundred forty-four thousand, five hundred seventeen".