42101212431121 has 4 divisors (see below), whose sum is σ = 44577754338852. Its totient is φ = 39624670523392.

The previous prime is 42101212431097. The next prime is 42101212431127. The reversal of 42101212431121 is 12113421210124.

42101212431121 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 11902230901521 + 30198981529600 = 3449961^2 + 5495360^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42101212431121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42101212431127) 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, 1238270953840 + ... + 1238270953873.

It is an arithmetic number, because the mean of its divisors is an integer number (11144438584713).

Almost surely, 2^{42101212431121} is an apocalyptic number.

It is an amenable number.

42101212431121 is a deficient number, since it is larger than the sum of its proper divisors (2476541907731).

42101212431121 is a wasteful number, since it uses less digits than its factorization.

42101212431121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2476541907730.

The product of its (nonzero) digits is 768, while the sum is 25.

Adding to 42101212431121 its reverse (12113421210124), we get a palindrome (54214633641245).

The spelling of 42101212431121 in words is "forty-two trillion, one hundred one billion, two hundred twelve million, four hundred thirty-one thousand, one hundred twenty-one".