201002721 has 16 divisors (see below), whose sum is σ = 271759488. Its totient is φ = 132134400.

The previous prime is 201002719. The next prime is 201002743. The reversal of 201002721 is 127200102.

It is not a de Polignac number, because 201002721 - 2¹ = 201002719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201002721.

It is not an unprimeable number, because it can be changed into a prime (201002771) 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, 89391 + ... + 91611.

It is an arithmetic number, because the mean of its divisors is an integer number (16984968).

Almost surely, 2^201002721 is an apocalyptic number.

It is an amenable number.

201002721 is a deficient number, since it is larger than the sum of its proper divisors (70756767).

201002721 is a wasteful number, since it uses less digits than its factorization.

201002721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2632.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 201002721 is about 14177.5428407041. The cubic root of 201002721 is about 585.7792435336.

Adding to 201002721 its reverse (127200102), we get a palindrome (328202823).

The spelling of 201002721 in words is "two hundred one million, two thousand, seven hundred twenty-one".