1346464665221 has 4 divisors (see below), whose sum is σ = 1450038870252. Its totient is φ = 1242890460192.

The previous prime is 1346464665173. The next prime is 1346464665257. The reversal of 1346464665221 is 1225664646431.

It is a happy number.

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 325172517121 + 1021292148100 = 570239^2 + 1010590^2 .

It is a cyclic number.

It is not a de Polignac number, because 1346464665221 - 2¹⁰ = 1346464664197 is a prime.

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 1346464665221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1346464665281) 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, 51787102496 + ... + 51787102521.

It is an arithmetic number, because the mean of its divisors is an integer number (362509717563).

Almost surely, 2^{1346464665221} is an apocalyptic number.

It is an amenable number.

1346464665221 is a deficient number, since it is larger than the sum of its proper divisors (103574205031).

1346464665221 is a wasteful number, since it uses less digits than its factorization.

1346464665221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103574205030.

The product of its digits is 4976640, while the sum is 50.

The spelling of 1346464665221 in words is "one trillion, three hundred forty-six billion, four hundred sixty-four million, six hundred sixty-five thousand, two hundred twenty-one".