213342123 has 4 divisors (see below), whose sum is σ = 284456168. Its totient is φ = 142228080.

The previous prime is 213342113. The next prime is 213342133. The reversal of 213342123 is 321243312.

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

It is an interprime number because it is at equal distance from previous prime (213342113) and next prime (213342133).

It is not a de Polignac number, because 213342123 - 2⁸ = 213341867 is a prime.

It is a super-2 number, since 2×213342123² = 91029722892294258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213342123.

It is not an unprimeable number, because it can be changed into a prime (213342113) 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, 35557018 + ... + 35557023.

It is an arithmetic number, because the mean of its divisors is an integer number (71114042).

Almost surely, 2^213342123 is an apocalyptic number.

213342123 is a deficient number, since it is larger than the sum of its proper divisors (71114045).

213342123 is an equidigital number, since it uses as much as digits as its factorization.

213342123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71114044.

The product of its digits is 864, while the sum is 21.

The square root of 213342123 is about 14606.2357573743. The cubic root of 213342123 is about 597.5288390228.

Adding to 213342123 its reverse (321243312), we get a palindrome (534585435).

The spelling of 213342123 in words is "two hundred thirteen million, three hundred forty-two thousand, one hundred twenty-three".