213231130321 has 4 divisors (see below), whose sum is σ = 232615778544. Its totient is φ = 193846482100.

The previous prime is 213231130241. The next prime is 213231130327. The reversal of 213231130321 is 123031132312.

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 213231130321 - 2¹⁹ = 213230606033 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213231130292 and 213231130301.

It is not an unprimeable number, because it can be changed into a prime (213231130327) 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, 9692324095 + ... + 9692324116.

It is an arithmetic number, because the mean of its divisors is an integer number (58153944636).

Almost surely, 2^213231130321 is an apocalyptic number.

It is an amenable number.

213231130321 is a deficient number, since it is larger than the sum of its proper divisors (19384648223).

213231130321 is a wasteful number, since it uses less digits than its factorization.

213231130321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19384648222.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 213231130321 its reverse (123031132312), we get a palindrome (336262262633).

The spelling of 213231130321 in words is "two hundred thirteen billion, two hundred thirty-one million, one hundred thirty thousand, three hundred twenty-one".