12021142323 has 16 divisors (see below), whose sum is σ = 16974282240. Its totient is φ = 7541229696.

The previous prime is 12021142297. The next prime is 12021142337. The reversal of 12021142323 is 32324112021.

It is a de Polignac number, because none of the positive numbers 2^k-12021142323 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12021142323.

It is not an unprimeable number, because it can be changed into a prime (12021142373) 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, 286738 + ... + 325976.

It is an arithmetic number, because the mean of its divisors is an integer number (1060892640).

Almost surely, 2^12021142323 is an apocalyptic number.

12021142323 is a deficient number, since it is larger than the sum of its proper divisors (4953139917).

12021142323 is a wasteful number, since it uses less digits than its factorization.

12021142323 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45266.

The product of its (nonzero) digits is 576, while the sum is 21.

Adding to 12021142323 its reverse (32324112021), we get a palindrome (44345254344).

The spelling of 12021142323 in words is "twelve billion, twenty-one million, one hundred forty-two thousand, three hundred twenty-three".