210221113 has 4 divisors (see below), whose sum is σ = 210506320. Its totient is φ = 209935908.

The previous prime is 210221107. The next prime is 210221119. The reversal of 210221113 is 311122012.

210221113 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 an interprime number because it is at equal distance from previous prime (210221107) and next prime (210221119).

It is a cyclic number.

It is not a de Polignac number, because 210221113 - 2¹³ = 210212921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 210221093 and 210221102.

It is not an unprimeable number, because it can be changed into a prime (210221119) 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, 141495 + ... + 142972.

It is an arithmetic number, because the mean of its divisors is an integer number (52626580).

Almost surely, 2^210221113 is an apocalyptic number.

It is an amenable number.

210221113 is a deficient number, since it is larger than the sum of its proper divisors (285207).

210221113 is an equidigital number, since it uses as much as digits as its factorization.

210221113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285206.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 210221113 is about 14499.0038623348. The cubic root of 210221113 is about 594.6007377220.

Adding to 210221113 its reverse (311122012), we get a palindrome (521343125).

The spelling of 210221113 in words is "two hundred ten million, two hundred twenty-one thousand, one hundred thirteen".