123131331305 has 8 divisors (see below), whose sum is σ = 147815808000. Its totient is φ = 98466258096.

The previous prime is 123131331293. The next prime is 123131331343. The reversal of 123131331305 is 503133131321.

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

It is a cyclic number.

It is not a de Polignac number, because 123131331305 - 2¹⁸ = 123131069161 is a prime.

It is a super-2 number, since 2×123131331305² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4836905 + ... + 4862294.

It is an arithmetic number, because the mean of its divisors is an integer number (18476976000).

Almost surely, 2^123131331305 is an apocalyptic number.

It is an amenable number.

123131331305 is a deficient number, since it is larger than the sum of its proper divisors (24684476695).

123131331305 is an equidigital number, since it uses as much as digits as its factorization.

123131331305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9701743.

The product of its (nonzero) digits is 2430, while the sum is 26.

Adding to 123131331305 its reverse (503133131321), we get a palindrome (626264462626).

The spelling of 123131331305 in words is "one hundred twenty-three billion, one hundred thirty-one million, three hundred thirty-one thousand, three hundred five".