2104122311345 has 4 divisors (see below), whose sum is σ = 2524946773620. Its totient is φ = 1683297849072.

The previous prime is 2104122311321. The next prime is 2104122311351. The reversal of 2104122311345 is 5431132214012.

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 1425082037824 + 679040273521 = 1193768^2 + 824039^2 .

It is a cyclic number.

It is not a de Polignac number, because 2104122311345 - 2¹² = 2104122307249 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210412231130 + ... + 210412231139.

It is an arithmetic number, because the mean of its divisors is an integer number (631236693405).

Almost surely, 2^{2104122311345} is an apocalyptic number.

It is an amenable number.

2104122311345 is a deficient number, since it is larger than the sum of its proper divisors (420824462275).

2104122311345 is an equidigital number, since it uses as much as digits as its factorization.

2104122311345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420824462274.

The product of its (nonzero) digits is 5760, while the sum is 29.

Adding to 2104122311345 its reverse (5431132214012), we get a palindrome (7535254525357).

The spelling of 2104122311345 in words is "two trillion, one hundred four billion, one hundred twenty-two million, three hundred eleven thousand, three hundred forty-five".