12402010042 has 4 divisors (see below), whose sum is σ = 18603015066. Its totient is φ = 6201005020.

The previous prime is 12402010039. The next prime is 12402010043. The reversal of 12402010042 is 24001020421.

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., 11795914881 + 606095161 = 108609^2 + 24619^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12402009998 and 12402010025.

It is not an unprimeable number, because it can be changed into a prime (12402010043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3100502509 + ... + 3100502512.

Almost surely, 2^12402010042 is an apocalyptic number.

12402010042 is a deficient number, since it is larger than the sum of its proper divisors (6201005024).

12402010042 is an equidigital number, since it uses as much as digits as its factorization.

12402010042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6201005023.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 12402010042 its reverse (24001020421), we get a palindrome (36403030463).

The spelling of 12402010042 in words is "twelve billion, four hundred two million, ten thousand, forty-two".