12000311323221 has 24 divisors (see below), whose sum is σ = 18079192996416. Its totient is φ = 7063728397440.

The previous prime is 12000311323127. The next prime is 12000311323237. The reversal of 12000311323221 is 12232311300021.

It is not a de Polignac number, because 12000311323221 - 2²⁵ = 12000277768789 is a prime.

It is a super-2 number, since 2×12000311323221² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12000311323291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 514537320 + ... + 514560641.

It is an arithmetic number, because the mean of its divisors is an integer number (753299708184).

Almost surely, 2^{12000311323221} is an apocalyptic number.

It is an amenable number.

12000311323221 is a deficient number, since it is larger than the sum of its proper divisors (6078881673195).

12000311323221 is a wasteful number, since it uses less digits than its factorization.

12000311323221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1029098013 (or 1029098000 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 12000311323221 its reverse (12232311300021), we get a palindrome (24232622623242).

It can be divided in two parts, 1200031 and 1323221, that added together give a palindrome (2523252).

The spelling of 12000311323221 in words is "twelve trillion, three hundred eleven million, three hundred twenty-three thousand, two hundred twenty-one".