20202101 has 4 divisors (see below), whose sum is σ = 20255232. Its totient is φ = 20148972.

The previous prime is 20202097. The next prime is 20202107. The reversal of 20202101 is 10120202.

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 a cyclic number.

It is not a de Polignac number, because 20202101 - 2² = 20202097 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20202107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25991 + ... + 26756.

It is an arithmetic number, because the mean of its divisors is an integer number (5063808).

Almost surely, 2^20202101 is an apocalyptic number.

It is an amenable number.

20202101 is a deficient number, since it is larger than the sum of its proper divisors (53131).

20202101 is an equidigital number, since it uses as much as digits as its factorization.

20202101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53130.

The product of its (nonzero) digits is 8, while the sum is 8.

The square root of 20202101 is about 4494.6747379538. The cubic root of 20202101 is about 272.3530099721.

Adding to 20202101 its reverse (10120202), we get a palindrome (30322303).

It can be divided in two parts, 20202 and 101, that multiplied together give a palindrome (2040402).

The spelling of 20202101 in words is "twenty million, two hundred two thousand, one hundred one".