12040221523 has 12 divisors (see below), whose sum is σ = 13484003904. Its totient is φ = 10739128400.

The previous prime is 12040221517. The next prime is 12040221547. The reversal of 12040221523 is 32512204021.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-12040221523 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12040221494 and 12040221503.

It is not an unprimeable number, because it can be changed into a prime (12040227523) 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 11 ways as a sum of consecutive naturals, for example, 932323 + ... + 945148.

It is an arithmetic number, because the mean of its divisors is an integer number (1123666992).

Almost surely, 2^12040221523 is an apocalyptic number.

12040221523 is a deficient number, since it is larger than the sum of its proper divisors (1443782381).

12040221523 is a wasteful number, since it uses less digits than its factorization.

12040221523 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877546 (or 1877535 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

Adding to 12040221523 its reverse (32512204021), we get a palindrome (44552425544).

The spelling of 12040221523 in words is "twelve billion, forty million, two hundred twenty-one thousand, five hundred twenty-three".