202421101 has 8 divisors (see below), whose sum is σ = 203646744. Its totient is φ = 201199680.

The previous prime is 202421099. The next prime is 202421111. The reversal of 202421101 is 101124202.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 83283876 + 119137225 = 9126^2 + 10915^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 202421101 - 2¹ = 202421099 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 (202421111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157875 + ... + 159151.

It is an arithmetic number, because the mean of its divisors is an integer number (25455843).

Almost surely, 2^202421101 is an apocalyptic number.

It is an amenable number.

202421101 is a deficient number, since it is larger than the sum of its proper divisors (1225643).

202421101 is a wasteful number, since it uses less digits than its factorization.

202421101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2111.

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 202421101 is about 14227.4769723939. The cubic root of 202421101 is about 587.1538698133.

Adding to 202421101 its reverse (101124202), we get a palindrome (303545303).

The spelling of 202421101 in words is "two hundred two million, four hundred twenty-one thousand, one hundred one".