12021134223 has 64 divisors (see below), whose sum is σ = 19032645632. Its totient is φ = 6606956160.

The previous prime is 12021134221. The next prime is 12021134233. The reversal of 12021134223 is 32243112021.

It is not a de Polignac number, because 12021134223 - 2¹ = 12021134221 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 12021134223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021134221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 28553553 + ... + 28553973.

It is an arithmetic number, because the mean of its divisors is an integer number (297385088).

Almost surely, 2^12021134223 is an apocalyptic number.

12021134223 is a deficient number, since it is larger than the sum of its proper divisors (7011511409).

12021134223 is a wasteful number, since it uses less digits than its factorization.

12021134223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 884.

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

Adding to 12021134223 its reverse (32243112021), we get a palindrome (44264246244).

The spelling of 12021134223 in words is "twelve billion, twenty-one million, one hundred thirty-four thousand, two hundred twenty-three".