202013021 has 4 divisors (see below), whose sum is σ = 230872032. Its totient is φ = 173154012.

The previous prime is 202012969. The next prime is 202013039. The reversal of 202013021 is 120310202.

It is a happy number.

202013021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 202013021 - 2¹⁴ = 201996637 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 202012993 and 202013011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202013221) 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, 14429495 + ... + 14429508.

It is an arithmetic number, because the mean of its divisors is an integer number (57718008).

Almost surely, 2^202013021 is an apocalyptic number.

It is an amenable number.

202013021 is a deficient number, since it is larger than the sum of its proper divisors (28859011).

202013021 is an equidigital number, since it uses as much as digits as its factorization.

202013021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28859010.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 202013021 is about 14213.1284733517. The cubic root of 202013021 is about 586.7590378758.

Adding to 202013021 its reverse (120310202), we get a palindrome (322323223).

The spelling of 202013021 in words is "two hundred two million, thirteen thousand, twenty-one".