12016240020421 has 16 divisors (see below), whose sum is σ = 14991810529024. Its totient is φ = 9377117000064.

The previous prime is 12016240020401. The next prime is 12016240020457. The reversal of 12016240020421 is 12402004261021.

It is a cyclic number.

It is not a de Polignac number, because 12016240020421 - 2¹¹ = 12016240018373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12016240020401) 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, 904422081 + ... + 904435366.

It is an arithmetic number, because the mean of its divisors is an integer number (936988158064).

Almost surely, 2^{12016240020421} is an apocalyptic number.

It is an amenable number.

12016240020421 is a deficient number, since it is larger than the sum of its proper divisors (2975570508603).

12016240020421 is a wasteful number, since it uses less digits than its factorization.

12016240020421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1808857540.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 12016240020421 its reverse (12402004261021), we get a palindrome (24418244281442).

The spelling of 12016240020421 in words is "twelve trillion, sixteen billion, two hundred forty million, twenty thousand, four hundred twenty-one".