213301421 has 4 divisors (see below), whose sum is σ = 220182144. Its totient is φ = 206420700.

The previous prime is 213301381. The next prime is 213301427. The reversal of 213301421 is 124103312.

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 213301421 - 2¹⁰ = 213300397 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 213301421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213301427) 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, 3440315 + ... + 3440376.

It is an arithmetic number, because the mean of its divisors is an integer number (55045536).

Almost surely, 2^213301421 is an apocalyptic number.

It is an amenable number.

213301421 is a deficient number, since it is larger than the sum of its proper divisors (6880723).

213301421 is an equidigital number, since it uses as much as digits as its factorization.

213301421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6880722.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 213301421 is about 14604.8423818951. The cubic root of 213301421 is about 597.4908372048.

Adding to 213301421 its reverse (124103312), we get a palindrome (337404733).

The spelling of 213301421 in words is "two hundred thirteen million, three hundred one thousand, four hundred twenty-one".