202100001 has 4 divisors (see below), whose sum is σ = 269466672. Its totient is φ = 134733332.

The previous prime is 202099993. The next prime is 202100033. The reversal of 202100001 is 100001202.

It is a happy number.

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 202100001 - 2³ = 202099993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (202100051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33683331 + ... + 33683336.

It is an arithmetic number, because the mean of its divisors is an integer number (67366668).

Almost surely, 2^202100001 is an apocalyptic number.

It is an amenable number.

202100001 is a deficient number, since it is larger than the sum of its proper divisors (67366671).

202100001 is an equidigital number, since it uses as much as digits as its factorization.

202100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67366670.

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

The square root of 202100001 is about 14216.1879911599. The cubic root of 202100001 is about 586.8432386826.

Adding to 202100001 its reverse (100001202), we get a palindrome (302101203).

It can be divided in two parts, 202 and 100001, that multiplied together give a palindrome (20200202).

The spelling of 202100001 in words is "two hundred two million, one hundred thousand, one".