202113021 has 16 divisors (see below), whose sum is σ = 294435648. Its totient is φ = 122304000.

The previous prime is 202113001. The next prime is 202113031. The reversal of 202113021 is 120311202.

It is not a de Polignac number, because 202113021 - 2⁹ = 202112509 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202112988 and 202113006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202113001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18765 + ... + 27501.

It is an arithmetic number, because the mean of its divisors is an integer number (18402228).

Almost surely, 2^202113021 is an apocalyptic number.

It is an amenable number.

202113021 is a deficient number, since it is larger than the sum of its proper divisors (92322627).

202113021 is a wasteful number, since it uses less digits than its factorization.

202113021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9452.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 202113021 is about 14216.6459124507. The cubic root of 202113021 is about 586.8558405873.

Adding to 202113021 its reverse (120311202), we get a palindrome (322424223).

It can be divided in two parts, 20211 and 3021, that added together give a palindrome (23232).

The spelling of 202113021 in words is "two hundred two million, one hundred thirteen thousand, twenty-one".