1323121969685 has 4 divisors (see below), whose sum is σ = 1587746363628. Its totient is φ = 1058497575744.

The previous prime is 1323121969661. The next prime is 1323121969811. The reversal of 1323121969685 is 5869691213231.

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

It can be written as a sum of positive squares in 2 ways, for example, as 564191770129 + 758930199556 = 751127^2 + 871166^2 .

It is a cyclic number.

It is not a de Polignac number, because 1323121969685 - 2¹⁴ = 1323121953301 is a prime.

It is a super-2 number, since 2×1323121969685² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1323121969685.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 132312196964 + ... + 132312196973.

It is an arithmetic number, because the mean of its divisors is an integer number (396936590907).

Almost surely, 2^{1323121969685} is an apocalyptic number.

It is an amenable number.

1323121969685 is a deficient number, since it is larger than the sum of its proper divisors (264624393943).

1323121969685 is an equidigital number, since it uses as much as digits as its factorization.

1323121969685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 264624393942.

The product of its digits is 4199040, while the sum is 56.

The spelling of 1323121969685 in words is "one trillion, three hundred twenty-three billion, one hundred twenty-one million, nine hundred sixty-nine thousand, six hundred eighty-five".