231120210205 has 8 divisors (see below), whose sum is σ = 281890879704. Its totient is φ = 181865083200.

The previous prime is 231120210203. The next prime is 231120210247. The reversal of 231120210205 is 502012021132.

It can be written as a sum of positive squares in 4 ways, for example, as 19024960761 + 212095249444 = 137931^2 + 460538^2 .

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

It is not a de Polignac number, because 231120210205 - 2¹ = 231120210203 is a prime.

It is a super-2 number, since 2×231120210205² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231120210203) 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, 378885286 + ... + 378885895.

It is an arithmetic number, because the mean of its divisors is an integer number (35236359963).

Almost surely, 2^231120210205 is an apocalyptic number.

It is an amenable number.

231120210205 is a deficient number, since it is larger than the sum of its proper divisors (50770669499).

231120210205 is an equidigital number, since it uses as much as digits as its factorization.

231120210205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757771247.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 231120210205 its reverse (502012021132), we get a palindrome (733132231337).

The spelling of 231120210205 in words is "two hundred thirty-one billion, one hundred twenty million, two hundred ten thousand, two hundred five".