213302121 has 16 divisors (see below), whose sum is σ = 291078144. Its totient is φ = 138876944.

The previous prime is 213302119. The next prime is 213302123. The reversal of 213302121 is 121203312.

It is an interprime number because it is at equal distance from previous prime (213302119) and next prime (213302123).

It is a cyclic number.

It is not a de Polignac number, because 213302121 - 2¹ = 213302119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 213302121.

It is not an unprimeable number, because it can be changed into a prime (213302123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78040 + ... + 80726.

It is an arithmetic number, because the mean of its divisors is an integer number (18192384).

Almost surely, 2^213302121 is an apocalyptic number.

It is an amenable number.

213302121 is a deficient number, since it is larger than the sum of its proper divisors (77776023).

213302121 is a wasteful number, since it uses less digits than its factorization.

213302121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3300.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 213302121 is about 14604.8663465298. The cubic root of 213302121 is about 597.4914908074.

Adding to 213302121 its reverse (121203312), we get a palindrome (334505433).

The spelling of 213302121 in words is "two hundred thirteen million, three hundred two thousand, one hundred twenty-one".