42100020101 has 4 divisors (see below), whose sum is σ = 42137510112. Its totient is φ = 42062530092.

The previous prime is 42100020007. The next prime is 42100020121. The reversal of 42100020101 is 10102000124.

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 a de Polignac number, because none of the positive numbers 2^k-42100020101 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 (42100020121) 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, 18743321 + ... + 18745566.

It is an arithmetic number, because the mean of its divisors is an integer number (10534377528).

Almost surely, 2^42100020101 is an apocalyptic number.

It is an amenable number.

42100020101 is a deficient number, since it is larger than the sum of its proper divisors (37490011).

42100020101 is a wasteful number, since it uses less digits than its factorization.

42100020101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37490010.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 42100020101 its reverse (10102000124), we get a palindrome (52202020225).

The spelling of 42100020101 in words is "forty-two billion, one hundred million, twenty thousand, one hundred one".