202421001 has 4 divisors (see below), whose sum is σ = 269894672. Its totient is φ = 134947332.

The previous prime is 202420993. The next prime is 202421017. The reversal of 202421001 is 100124202.

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 not a de Polignac number, because 202421001 - 2³ = 202420993 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (202421501) 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, 33736831 + ... + 33736836.

It is an arithmetic number, because the mean of its divisors is an integer number (67473668).

Almost surely, 2^202421001 is an apocalyptic number.

It is an amenable number.

202421001 is a deficient number, since it is larger than the sum of its proper divisors (67473671).

202421001 is an equidigital number, since it uses as much as digits as its factorization.

202421001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67473670.

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 202421001 is about 14227.4734580670. The cubic root of 202421001 is about 587.1537731247.

Adding to 202421001 its reverse (100124202), we get a palindrome (302545203).

The spelling of 202421001 in words is "two hundred two million, four hundred twenty-one thousand, one".