123016213 has 4 divisors (see below), whose sum is σ = 128364768. Its totient is φ = 117667660.

The previous prime is 123016211. The next prime is 123016217. The reversal of 123016213 is 312610321.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 312610321 = 13267 ⋅23563.

It is a cyclic number.

It is not a de Polignac number, because 123016213 - 2¹ = 123016211 is a prime.

It is a super-2 number, since 2×123016213² = 30265977321722738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123016211) 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, 2674243 + ... + 2674288.

It is an arithmetic number, because the mean of its divisors is an integer number (32091192).

Almost surely, 2^123016213 is an apocalyptic number.

It is an amenable number.

123016213 is a deficient number, since it is larger than the sum of its proper divisors (5348555).

123016213 is an equidigital number, since it uses as much as digits as its factorization.

123016213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5348554.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 123016213 is about 11091.2674208135. The cubic root of 123016213 is about 497.3408334039.

Adding to 123016213 its reverse (312610321), we get a palindrome (435626534).

The spelling of 123016213 in words is "one hundred twenty-three million, sixteen thousand, two hundred thirteen".