201020510402 has 16 divisors (see below), whose sum is σ = 330277107960. Its totient is φ = 91335890688.

The previous prime is 201020510401. The next prime is 201020510429. The reversal of 201020510402 is 204015020102.

It can be written as a sum of positive squares in 4 ways, for example, as 173488077361 + 27532433041 = 416519^2 + 165929^2 .

It is a Harshad number since it is a multiple of its sum of digits (17).

It is not an unprimeable number, because it can be changed into a prime (201020510401) 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, 101936393 + ... + 101938364.

Almost surely, 2^201020510402 is an apocalyptic number.

201020510402 is a deficient number, since it is larger than the sum of its proper divisors (129256597558).

201020510402 is a wasteful number, since it uses less digits than its factorization.

201020510402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203874805.

The product of its (nonzero) digits is 160, while the sum is 17.

Adding to 201020510402 its reverse (204015020102), we get a palindrome (405035530504).

The spelling of 201020510402 in words is "two hundred one billion, twenty million, five hundred ten thousand, four hundred two".