20100201 has 16 divisors (see below), whose sum is σ = 29676288. Its totient is φ = 11998800.

The previous prime is 20100191. The next prime is 20100203. The reversal of 20100201 is 10200102.

It is a happy number.

It is not a de Polignac number, because 20100201 - 2⁹ = 20099689 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20100201.

It is not an unprimeable number, because it can be changed into a prime (20100203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2335 + ... + 6756.

It is an arithmetic number, because the mean of its divisors is an integer number (1854768).

Almost surely, 2^20100201 is an apocalyptic number.

It is an amenable number.

20100201 is a deficient number, since it is larger than the sum of its proper divisors (9576087).

20100201 is a wasteful number, since it uses less digits than its factorization.

20100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9172.

The product of its (nonzero) digits is 4, while the sum is 6.

The square root of 20100201 is about 4483.3247707477. The cubic root of 20100201 is about 271.8943189866.

Adding to 20100201 its reverse (10200102), we get a palindrome (30300303).

Subtracting from 20100201 its reverse (10200102), we obtain a palindrome (9900099).

It can be divided in two parts, 20100 and 201, that multiplied together give a square (4040100 = 2010²).

The spelling of 20100201 in words is "twenty million, one hundred thousand, two hundred one".