2123210345 has 8 divisors (see below), whose sum is σ = 2549852160. Its totient is φ = 1697235120.

The previous prime is 2123210279. The next prime is 2123210371. The reversal of 2123210345 is 5430123212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2123210345 - 2¹⁶ = 2123144809 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2123210345.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 159611 + ... + 172400.

It is an arithmetic number, because the mean of its divisors is an integer number (318731520).

Almost surely, 2^2123210345 is an apocalyptic number.

It is an amenable number.

2123210345 is a deficient number, since it is larger than the sum of its proper divisors (426641815).

2123210345 is a wasteful number, since it uses less digits than its factorization.

2123210345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333295.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 2123210345 is about 46078.3066637653. The cubic root of 2123210345 is about 1285.2797757685.

Adding to 2123210345 its reverse (5430123212), we get a palindrome (7553333557).

The spelling of 2123210345 in words is "two billion, one hundred twenty-three million, two hundred ten thousand, three hundred forty-five".