213231020331 has 8 divisors (see below), whose sum is σ = 324923459584. Its totient is φ = 121846297320.

The previous prime is 213231020309. The next prime is 213231020333. The reversal of 213231020331 is 133020132312.

213231020331 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 213231020331 - 2⁹ = 213231019819 is a prime.

It is a super-2 number, since 2×213231020331² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 10153858111 = 213231020331 / (2 + 1 + 3 + 2 + 3 + 1 + 0 + 2 + 0 + 3 + 3 + 1).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 213231020298 and 213231020307.

It is not an unprimeable number, because it can be changed into a prime (213231020333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5076929035 + ... + 5076929076.

It is an arithmetic number, because the mean of its divisors is an integer number (40615432448).

Almost surely, 2^213231020331 is an apocalyptic number.

213231020331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

213231020331 is a deficient number, since it is larger than the sum of its proper divisors (111692439253).

213231020331 is a wasteful number, since it uses less digits than its factorization.

213231020331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10153858121.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 213231020331 its reverse (133020132312), we get a palindrome (346251152643).

The spelling of 213231020331 in words is "two hundred thirteen billion, two hundred thirty-one million, twenty thousand, three hundred thirty-one".