12123102031311 has 4 divisors (see below), whose sum is σ = 16164136041752. Its totient is φ = 8082068020872.

The previous prime is 12123102031307. The next prime is 12123102031363. The reversal of 12123102031311 is 11313020132121.

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

It is not a de Polignac number, because 12123102031311 - 2² = 12123102031307 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12123102051311) 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, 2020517005216 + ... + 2020517005221.

It is an arithmetic number, because the mean of its divisors is an integer number (4041034010438).

Almost surely, 2^{12123102031311} is an apocalyptic number.

12123102031311 is a deficient number, since it is larger than the sum of its proper divisors (4041034010441).

12123102031311 is an equidigital number, since it uses as much as digits as its factorization.

12123102031311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4041034010440.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 12123102031311 its reverse (11313020132121), we get a palindrome (23436122163432).

The spelling of 12123102031311 in words is "twelve trillion, one hundred twenty-three billion, one hundred two million, thirty-one thousand, three hundred eleven".