12001311123223 has 16 divisors (see below), whose sum is σ = 12060604482624. Its totient is φ = 11942206928640.

The previous prime is 12001311123143. The next prime is 12001311123251. The reversal of 12001311123223 is 32232111310021.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12001311123223 is a prime.

It is a super-2 number, since 2×12001311123223² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12001311123194 and 12001311123203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12001311123253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255231211 + ... + 255278227.

It is an arithmetic number, because the mean of its divisors is an integer number (753787780164).

Almost surely, 2^{12001311123223} is an apocalyptic number.

12001311123223 is a deficient number, since it is larger than the sum of its proper divisors (59293359401).

12001311123223 is an equidigital number, since it uses as much as digits as its factorization.

12001311123223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49002.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 12001311123223 its reverse (32232111310021), we get a palindrome (44233422433244).

The spelling of 12001311123223 in words is "twelve trillion, one billion, three hundred eleven million, one hundred twenty-three thousand, two hundred twenty-three".