123213131 has 8 divisors (see below), whose sum is σ = 124528128. Its totient is φ = 121905000.

The previous prime is 123213091. The next prime is 123213137. The reversal of 123213131 is 131312321.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123213131 is a prime.

It is a super-2 number, since 2×123213131² = 30362951301646322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123213137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39416 + ... + 42426.

It is an arithmetic number, because the mean of its divisors is an integer number (15566016).

Almost surely, 2^123213131 is an apocalyptic number.

123213131 is a deficient number, since it is larger than the sum of its proper divisors (1314997).

123213131 is a wasteful number, since it uses less digits than its factorization.

123213131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3433.

The product of its digits is 108, while the sum is 17.

The square root of 123213131 is about 11100.1410351400. The cubic root of 123213131 is about 497.6060644377.

Adding to 123213131 its reverse (131312321), we get a palindrome (254525452).

The spelling of 123213131 in words is "one hundred twenty-three million, two hundred thirteen thousand, one hundred thirty-one".