42112103021 has 4 divisors (see below), whose sum is σ = 42498452700. Its totient is φ = 41725753344.

The previous prime is 42112102969. The next prime is 42112103029. The reversal of 42112103021 is 12030121124.

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 26654154121 + 15457948900 = 163261^2 + 124330^2 .

It is a cyclic number.

It is not a de Polignac number, because 42112103021 - 2⁶ = 42112102957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42112103029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193174676 + ... + 193174893.

It is an arithmetic number, because the mean of its divisors is an integer number (10624613175).

Almost surely, 2^42112103021 is an apocalyptic number.

It is an amenable number.

42112103021 is a deficient number, since it is larger than the sum of its proper divisors (386349679).

42112103021 is a wasteful number, since it uses less digits than its factorization.

42112103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386349678.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 42112103021 its reverse (12030121124), we get a palindrome (54142224145).

The spelling of 42112103021 in words is "forty-two billion, one hundred twelve million, one hundred three thousand, twenty-one".