2145313346321 has 4 divisors (see below), whose sum is σ = 2153470431552. Its totient is φ = 2137156261092.

The previous prime is 2145313346317. The next prime is 2145313346339. The reversal of 2145313346321 is 1236433135412.

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 2145313346321 - 2² = 2145313346317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2145313346221) 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, 4078542221 + ... + 4078542746.

It is an arithmetic number, because the mean of its divisors is an integer number (538367607888).

Almost surely, 2^{2145313346321} is an apocalyptic number.

It is an amenable number.

2145313346321 is a deficient number, since it is larger than the sum of its proper divisors (8157085231).

2145313346321 is an equidigital number, since it uses as much as digits as its factorization.

2145313346321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8157085230.

The product of its digits is 155520, while the sum is 38.

The spelling of 2145313346321 in words is "two trillion, one hundred forty-five billion, three hundred thirteen million, three hundred forty-six thousand, three hundred twenty-one".