202401021 has 8 divisors (see below), whose sum is σ = 269942400. Its totient is φ = 134896832.

The previous prime is 202401019. The next prime is 202401029. The reversal of 202401021 is 120104202.

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 202401021 - 2¹ = 202401019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202400988 and 202401006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202401029) 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, 8005 + ... + 21653.

It is an arithmetic number, because the mean of its divisors is an integer number (33742800).

Almost surely, 2^202401021 is an apocalyptic number.

It is an amenable number.

202401021 is a deficient number, since it is larger than the sum of its proper divisors (67541379).

202401021 is a wasteful number, since it uses less digits than its factorization.

202401021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18595.

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

The square root of 202401021 is about 14226.7712781221. The cubic root of 202401021 is about 587.1344541174.

Adding to 202401021 its reverse (120104202), we get a palindrome (322505223).

The spelling of 202401021 in words is "two hundred two million, four hundred one thousand, twenty-one".