212513253123 has 4 divisors (see below), whose sum is σ = 283351004168. Its totient is φ = 141675502080.

The previous prime is 212513253077. The next prime is 212513253143. The reversal of 212513253123 is 321352315212.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 212513253123 - 2¹⁶ = 212513187587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212513253143) 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, 35418875518 + ... + 35418875523.

It is an arithmetic number, because the mean of its divisors is an integer number (70837751042).

Almost surely, 2^212513253123 is an apocalyptic number.

212513253123 is a deficient number, since it is larger than the sum of its proper divisors (70837751045).

212513253123 is an equidigital number, since it uses as much as digits as its factorization.

212513253123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70837751044.

The product of its digits is 10800, while the sum is 30.

Adding to 212513253123 its reverse (321352315212), we get a palindrome (533865568335).

The spelling of 212513253123 in words is "two hundred twelve billion, five hundred thirteen million, two hundred fifty-three thousand, one hundred twenty-three".