201020501 has 8 divisors (see below), whose sum is σ = 220433664. Its totient is φ = 181797120.

The previous prime is 201020471. The next prime is 201020527. The reversal of 201020501 is 105020102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201020501 - 2²² = 196826197 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (11).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201020101) 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 7 ways as a sum of consecutive naturals, for example, 45221 + ... + 49466.

It is an arithmetic number, because the mean of its divisors is an integer number (27554208).

Almost surely, 2^201020501 is an apocalyptic number.

It is an amenable number.

201020501 is a deficient number, since it is larger than the sum of its proper divisors (19413163).

201020501 is a wasteful number, since it uses less digits than its factorization.

201020501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94891.

The product of its (nonzero) digits is 20, while the sum is 11.

The square root of 201020501 is about 14178.1698748463. The cubic root of 201020501 is about 585.7965150210.

Adding to 201020501 its reverse (105020102), we get a palindrome (306040603).

The spelling of 201020501 in words is "two hundred one million, twenty thousand, five hundred one".