12342100440442 has 4 divisors (see below), whose sum is σ = 18513150660666. Its totient is φ = 6171050220220.

The previous prime is 12342100440427. The next prime is 12342100440473. The reversal of 12342100440442 is 24404400124321.

It is a happy number.

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., 10598403959361 + 1743696481081 = 3255519^2 + 1320491^2 .

It is a super-2 number, since 2×12342100440442² (a number of 27 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3085525110109 + ... + 3085525110112.

Almost surely, 2^{12342100440442} is an apocalyptic number.

12342100440442 is a deficient number, since it is larger than the sum of its proper divisors (6171050220224).

12342100440442 is an equidigital number, since it uses as much as digits as its factorization.

12342100440442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6171050220223.

The product of its (nonzero) digits is 24576, while the sum is 31.

Adding to 12342100440442 its reverse (24404400124321), we get a palindrome (36746500564763).

The spelling of 12342100440442 in words is "twelve trillion, three hundred forty-two billion, one hundred million, four hundred forty thousand, four hundred forty-two".