12240100042 has 4 divisors (see below), whose sum is σ = 18360150066. Its totient is φ = 6120050020.

The previous prime is 12240100039. The next prime is 12240100073. The reversal of 12240100042 is 24000104221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24000104221 = 727 ⋅33012523.

It can be written as a sum of positive squares in only one way, i.e., 11690150641 + 549949401 = 108121^2 + 23451^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12240099989 and 12240100025.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3060025009 + ... + 3060025012.

Almost surely, 2^12240100042 is an apocalyptic number.

12240100042 is a deficient number, since it is larger than the sum of its proper divisors (6120050024).

12240100042 is an equidigital number, since it uses as much as digits as its factorization.

12240100042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6120050023.

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

Adding to 12240100042 its reverse (24000104221), we get a palindrome (36240204263).

The spelling of 12240100042 in words is "twelve billion, two hundred forty million, one hundred thousand, forty-two".