12015202042 has 4 divisors (see below), whose sum is σ = 18022803066. Its totient is φ = 6007601020.

The previous prime is 12015202033. The next prime is 12015202049. The reversal of 12015202042 is 24020251021.

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

It can be written as a sum of positive squares in only one way, i.e., 11111057281 + 904144761 = 105409^2 + 30069^2 .

It is a super-2 number, since 2×12015202042² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12015202049) 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 as a sum of consecutive naturals, namely, 3003800509 + ... + 3003800512.

Almost surely, 2^12015202042 is an apocalyptic number.

12015202042 is a deficient number, since it is larger than the sum of its proper divisors (6007601024).

12015202042 is an equidigital number, since it uses as much as digits as its factorization.

12015202042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6007601023.

The product of its (nonzero) digits is 320, while the sum is 19.

Adding to 12015202042 its reverse (24020251021), we get a palindrome (36035453063).

The spelling of 12015202042 in words is "twelve billion, fifteen million, two hundred two thousand, forty-two".