201004021 has 4 divisors (see below), whose sum is σ = 211583200. Its totient is φ = 190424844.

The previous prime is 201004009. The next prime is 201004051. The reversal of 201004021 is 120400102.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120400102 = 2 ⋅60200051.

It is a cyclic number.

It is not a de Polignac number, because 201004021 - 2⁵ = 201003989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201003989 and 201004007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201004051) 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, 5289561 + ... + 5289598.

It is an arithmetic number, because the mean of its divisors is an integer number (52895800).

Almost surely, 2^201004021 is an apocalyptic number.

It is an amenable number.

201004021 is a deficient number, since it is larger than the sum of its proper divisors (10579179).

201004021 is a wasteful number, since it uses less digits than its factorization.

201004021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10579178.

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

The square root of 201004021 is about 14177.5886877847. The cubic root of 201004021 is about 585.7805063878.

Adding to 201004021 its reverse (120400102), we get a palindrome (321404123).

The spelling of 201004021 in words is "two hundred one million, four thousand, twenty-one".