213532121 has 16 divisors (see below), whose sum is σ = 247199040. Its totient is φ = 182292480.

The previous prime is 213532103. The next prime is 213532153. The reversal of 213532121 is 121235312.

It is a cyclic number.

It is not a de Polignac number, because 213532121 - 2⁶ = 213532057 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 213532093 and 213532102.

It is not an unprimeable number, because it can be changed into a prime (213532321) 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, 106910 + ... + 108888.

It is an arithmetic number, because the mean of its divisors is an integer number (15449940).

Almost surely, 2^213532121 is an apocalyptic number.

It is an amenable number.

213532121 is a deficient number, since it is larger than the sum of its proper divisors (33666919).

213532121 is a wasteful number, since it uses less digits than its factorization.

213532121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2584.

The product of its digits is 360, while the sum is 20.

The square root of 213532121 is about 14612.7383128557. The cubic root of 213532121 is about 597.7061685896.

Adding to 213532121 its reverse (121235312), we get a palindrome (334767433).

The spelling of 213532121 in words is "two hundred thirteen million, five hundred thirty-two thousand, one hundred twenty-one".