201042021 has 16 divisors (see below), whose sum is σ = 282536640. Its totient is φ = 126806400.

The previous prime is 201042013. The next prime is 201042113. The reversal of 201042021 is 120240102.

It is not a de Polignac number, because 201042021 - 2³ = 201042013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 201041988 and 201042006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201042521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 52471 + ... + 56171.

It is an arithmetic number, because the mean of its divisors is an integer number (17658540).

Almost surely, 2^201042021 is an apocalyptic number.

It is an amenable number.

201042021 is a deficient number, since it is larger than the sum of its proper divisors (81494619).

201042021 is a wasteful number, since it uses less digits than its factorization.

201042021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4676.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 201042021 is about 14178.9287677173. The cubic root of 201042021 is about 585.8174181811.

Adding to 201042021 its reverse (120240102), we get a palindrome (321282123).

The spelling of 201042021 in words is "two hundred one million, forty-two thousand, twenty-one".