2113215123 has 16 divisors (see below), whose sum is σ = 2927877120. Its totient is φ = 1354118304.

The previous prime is 2113215121. The next prime is 2113215149. The reversal of 2113215123 is 3215123112.

It is not a de Polignac number, because 2113215123 - 2¹ = 2113215121 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2113215123.

It is not an unprimeable number, because it can be changed into a prime (2113215121) 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 15 ways as a sum of consecutive naturals, for example, 35061 + ... + 73862.

It is an arithmetic number, because the mean of its divisors is an integer number (182992320).

Almost surely, 2^2113215123 is an apocalyptic number.

2113215123 is a deficient number, since it is larger than the sum of its proper divisors (814661997).

2113215123 is a wasteful number, since it uses less digits than its factorization.

2113215123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109178.

The product of its digits is 360, while the sum is 21.

The square root of 2113215123 is about 45969.7196315140. The cubic root of 2113215123 is about 1283.2597421941.

Adding to 2113215123 its reverse (3215123112), we get a palindrome (5328338235).

The spelling of 2113215123 in words is "two billion, one hundred thirteen million, two hundred fifteen thousand, one hundred twenty-three".