2145111131329 has 4 divisors (see below), whose sum is σ = 2145901812676. Its totient is φ = 2144320449984.

The previous prime is 2145111131299. The next prime is 2145111131341. The reversal of 2145111131329 is 9231311115412.

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 1456310727729 + 688800403600 = 1206777^2 + 829940^2 .

It is a cyclic number.

It is not a de Polignac number, because 2145111131329 - 2²⁵ = 2145077576897 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2145111131294 and 2145111131303.

It is not an unprimeable number, because it can be changed into a prime (2145111131389) 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, 395336604 + ... + 395342029.

It is an arithmetic number, because the mean of its divisors is an integer number (536475453169).

Almost surely, 2^{2145111131329} is an apocalyptic number.

It is an amenable number.

2145111131329 is a deficient number, since it is larger than the sum of its proper divisors (790681347).

2145111131329 is an equidigital number, since it uses as much as digits as its factorization.

2145111131329 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790681346.

The product of its digits is 6480, while the sum is 34.

The spelling of 2145111131329 in words is "two trillion, one hundred forty-five billion, one hundred eleven million, one hundred thirty-one thousand, three hundred twenty-nine".