42240121344401 has 4 divisors (see below), whose sum is σ = 42310404408804. Its totient is φ = 42169838280000.

The previous prime is 42240121344353. The next prime is 42240121344409. The reversal of 42240121344401 is 10444312104224.

42240121344401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It can be written as a sum of positive squares in 2 ways, for example, as 37117033140625 + 5123088203776 = 6092375^2 + 2263424^2 .

It is a cyclic number.

It is not a de Polignac number, because 42240121344401 - 2³⁸ = 41965243437457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42240121344409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35141531300 + ... + 35141532501.

It is an arithmetic number, because the mean of its divisors is an integer number (10577601102201).

Almost surely, 2^{42240121344401} is an apocalyptic number.

It is an amenable number.

42240121344401 is a deficient number, since it is larger than the sum of its proper divisors (70283064403).

42240121344401 is an equidigital number, since it uses as much as digits as its factorization.

42240121344401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70283064402.

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 42240121344401 its reverse (10444312104224), we get a palindrome (52684433448625).

The spelling of 42240121344401 in words is "forty-two trillion, two hundred forty billion, one hundred twenty-one million, three hundred forty-four thousand, four hundred one".