12041040021 has 16 divisors (see below), whose sum is σ = 16126786368. Its totient is φ = 7991360000.

The previous prime is 12041039987. The next prime is 12041040047. The reversal of 12041040021 is 12004014021.

It is a cyclic number.

It is not a de Polignac number, because 12041040021 - 2⁷ = 12041039893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12041041021) 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, 2721391 + ... + 2725811.

It is an arithmetic number, because the mean of its divisors is an integer number (1007924148).

Almost surely, 2^12041040021 is an apocalyptic number.

It is an amenable number.

12041040021 is a deficient number, since it is larger than the sum of its proper divisors (4085746347).

12041040021 is a wasteful number, since it uses less digits than its factorization.

12041040021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8292.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 12041040021 its reverse (12004014021), we get a palindrome (24045054042).

The spelling of 12041040021 in words is "twelve billion, forty-one million, forty thousand, twenty-one".