2312120344321 has 4 divisors (see below), whose sum is σ = 2355745256532. Its totient is φ = 2268495432112.

The previous prime is 2312120344319. The next prime is 2312120344333. The reversal of 2312120344321 is 1234430212132.

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 1925281127025 + 386839217296 = 1387545^2 + 621964^2 .

It is a cyclic number.

It is not a de Polignac number, because 2312120344321 - 2¹ = 2312120344319 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 2312120344321.

It is not an unprimeable number, because it can be changed into a prime (2312120344361) 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, 21812456026 + ... + 21812456131.

It is an arithmetic number, because the mean of its divisors is an integer number (588936314133).

Almost surely, 2^{2312120344321} is an apocalyptic number.

It is an amenable number.

2312120344321 is a deficient number, since it is larger than the sum of its proper divisors (43624912211).

2312120344321 is an equidigital number, since it uses as much as digits as its factorization.

2312120344321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43624912210.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 2312120344321 its reverse (1234430212132), we get a palindrome (3546550556453).

The spelling of 2312120344321 in words is "two trillion, three hundred twelve billion, one hundred twenty million, three hundred forty-four thousand, three hundred twenty-one".