2120345005105 has 4 divisors (see below), whose sum is σ = 2544414006132. Its totient is φ = 1696276004080.

The previous prime is 2120345005069. The next prime is 2120345005171. The reversal of 2120345005105 is 5015005430212.

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 410851514529 + 1709493490576 = 640977^2 + 1307476^2 .

It is not a de Polignac number, because 2120345005105 - 2¹⁹ = 2120344480817 is a prime.

It is a super-2 number, since 2×2120345005105² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212034500506 + ... + 212034500515.

It is an arithmetic number, because the mean of its divisors is an integer number (636103501533).

Almost surely, 2^{2120345005105} is an apocalyptic number.

It is an amenable number.

2120345005105 is a deficient number, since it is larger than the sum of its proper divisors (424069001027).

2120345005105 is an equidigital number, since it uses as much as digits as its factorization.

2120345005105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424069001026.

The product of its (nonzero) digits is 6000, while the sum is 28.

The spelling of 2120345005105 in words is "two trillion, one hundred twenty billion, three hundred forty-five million, five thousand, one hundred five".