201208021 has 4 divisors (see below), whose sum is σ = 229952032. Its totient is φ = 172464012.

The previous prime is 201208013. The next prime is 201208027. The reversal of 201208021 is 120802102.

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 not a de Polignac number, because 201208021 - 2³ = 201208013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 201207986 and 201208004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201208027) 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 3 ways as a sum of consecutive naturals, for example, 14371995 + ... + 14372008.

It is an arithmetic number, because the mean of its divisors is an integer number (57488008).

Almost surely, 2^201208021 is an apocalyptic number.

It is an amenable number.

201208021 is a deficient number, since it is larger than the sum of its proper divisors (28744011).

201208021 is an equidigital number, since it uses as much as digits as its factorization.

201208021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28744010.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 201208021 is about 14184.7813166083. The cubic root of 201208021 is about 585.9786099194.

The spelling of 201208021 in words is "two hundred one million, two hundred eight thousand, twenty-one".