42112444310021 has 4 divisors (see below), whose sum is σ = 42705577328544. Its totient is φ = 41519311291500.

The previous prime is 42112444309981. The next prime is 42112444310039. The reversal of 42112444310021 is 12001344421124.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42112444310021 - 2¹⁰ = 42112444308997 is a prime.

It is a super-2 number, since 2×42112444310021² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42112444310921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 296566509155 + ... + 296566509296.

It is an arithmetic number, because the mean of its divisors is an integer number (10676394332136).

Almost surely, 2^{42112444310021} is an apocalyptic number.

It is an amenable number.

42112444310021 is a deficient number, since it is larger than the sum of its proper divisors (593133018523).

42112444310021 is an equidigital number, since it uses as much as digits as its factorization.

42112444310021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593133018522.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 42112444310021 its reverse (12001344421124), we get a palindrome (54113788731145).

The spelling of 42112444310021 in words is "forty-two trillion, one hundred twelve billion, four hundred forty-four million, three hundred ten thousand, twenty-one".