12021160538 has 4 divisors (see below), whose sum is σ = 18031740810. Its totient is φ = 6010580268.

The previous prime is 12021160537. The next prime is 12021160573. The reversal of 12021160538 is 83506112021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83506112021 = 113969 ⋅732709.

It can be written as a sum of positive squares in only one way, i.e., 7782239089 + 4238921449 = 88217^2 + 65107^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12021160538.

It is not an unprimeable number, because it can be changed into a prime (12021160537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3005290133 + ... + 3005290136.

Almost surely, 2^12021160538 is an apocalyptic number.

12021160538 is a deficient number, since it is larger than the sum of its proper divisors (6010580272).

12021160538 is an equidigital number, since it uses as much as digits as its factorization.

12021160538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010580271.

The product of its (nonzero) digits is 2880, while the sum is 29.

Adding to 12021160538 its reverse (83506112021), we get a palindrome (95527272559).

The spelling of 12021160538 in words is "twelve billion, twenty-one million, one hundred sixty thousand, five hundred thirty-eight".