2045210123 has 24 divisors (see below), whose sum is σ = 2375231040. Its totient is φ = 1756832000.

The previous prime is 2045210119. The next prime is 2045210137. The reversal of 2045210123 is 3210125402.

It is not a de Polignac number, because 2045210123 - 2² = 2045210119 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2045210095 and 2045210104.

It is not an unprimeable number, because it can be changed into a prime (2045210173) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 158723 + ... + 171123.

It is an arithmetic number, because the mean of its divisors is an integer number (98967960).

Almost surely, 2^2045210123 is an apocalyptic number.

2045210123 is a deficient number, since it is larger than the sum of its proper divisors (330020917).

2045210123 is a wasteful number, since it uses less digits than its factorization.

2045210123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12499 (or 12488 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 2045210123 is about 45223.9994140279. Note that the first 3 decimals coincide. The cubic root of 2045210123 is about 1269.3439319160.

Adding to 2045210123 its reverse (3210125402), we get a palindrome (5255335525).

The spelling of 2045210123 in words is "two billion, forty-five million, two hundred ten thousand, one hundred twenty-three".