201100000042 has 4 divisors (see below), whose sum is σ = 301650000066. Its totient is φ = 100550000020.

The previous prime is 201100000037. The next prime is 201100000097. The reversal of 201100000042 is 240000001102.

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

It can be written as a sum of positive squares in only one way, i.e., 148718980881 + 52381019161 = 385641^2 + 228869^2 .

It is a junction number, because it is equal to n+sod(n) for n = 201099999974 and 201100000028.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 50275000009 + ... + 50275000012.

Almost surely, 2^201100000042 is an apocalyptic number.

201100000042 is a deficient number, since it is larger than the sum of its proper divisors (100550000024).

201100000042 is a wasteful number, since it uses less digits than its factorization.

201100000042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100550000023.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 201100000042 its reverse (240000001102), we get a palindrome (441100001144).

The spelling of 201100000042 in words is "two hundred one billion, one hundred million, forty-two", and thus it is an aban number.