213231032021 has 8 divisors (see below), whose sum is σ = 244328884224. Its totient is φ = 182292248880.

The previous prime is 213231032017. The next prime is 213231032023. The reversal of 213231032021 is 120230132312.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 213231032021 - 2² = 213231032017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213231031984 and 213231032002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213231032023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39764390 + ... + 39769751.

It is an arithmetic number, because the mean of its divisors is an integer number (30541110528).

Almost surely, 2^213231032021 is an apocalyptic number.

It is an amenable number.

213231032021 is a deficient number, since it is larger than the sum of its proper divisors (31097852203).

213231032021 is an equidigital number, since it uses as much as digits as its factorization.

213231032021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79534531.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 213231032021 its reverse (120230132312), we get a palindrome (333461164333).

The spelling of 213231032021 in words is "two hundred thirteen billion, two hundred thirty-one million, thirty-two thousand, twenty-one".