12021160405 has 4 divisors (see below), whose sum is σ = 14425392492. Its totient is φ = 9616928320.

The previous prime is 12021160297. The next prime is 12021160409. The reversal of 12021160405 is 50406112021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9441231556 + 2579928849 = 97166^2 + 50793^2 .

It is not a de Polignac number, because 12021160405 - 2⁹ = 12021159893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12021160409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1202116036 + ... + 1202116045.

It is an arithmetic number, because the mean of its divisors is an integer number (3606348123).

Almost surely, 2^12021160405 is an apocalyptic number.

It is an amenable number.

12021160405 is a deficient number, since it is larger than the sum of its proper divisors (2404232087).

12021160405 is an equidigital number, since it uses as much as digits as its factorization.

12021160405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2404232086.

The product of its (nonzero) digits is 480, while the sum is 22.

Adding to 12021160405 its reverse (50406112021), we get a palindrome (62427272426).

The spelling of 12021160405 in words is "twelve billion, twenty-one million, one hundred sixty thousand, four hundred five".