201242043406 has 4 divisors (see below), whose sum is σ = 301863065112. Its totient is φ = 100621021702.

The previous prime is 201242043391. The next prime is 201242043419. The reversal of 201242043406 is 604340242102.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50310510850 + ... + 50310510853.

It is an arithmetic number, because the mean of its divisors is an integer number (75465766278).

Almost surely, 2^201242043406 is an apocalyptic number.

201242043406 is a deficient number, since it is larger than the sum of its proper divisors (100621021706).

201242043406 is a wasteful number, since it uses less digits than its factorization.

201242043406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100621021705.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 201242043406 its reverse (604340242102), we get a palindrome (805582285508).

The spelling of 201242043406 in words is "two hundred one billion, two hundred forty-two million, forty-three thousand, four hundred six".