20313231211 has 48 divisors (see below), whose sum is σ = 26026291200. Its totient is φ = 15710490432.

The previous prime is 20313231209. The next prime is 20313231233. The reversal of 20313231211 is 11213231302.

It is not a de Polignac number, because 20313231211 - 2¹ = 20313231209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20313231271) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5181310 + ... + 5185228.

It is an arithmetic number, because the mean of its divisors is an integer number (542214400).

Almost surely, 2^20313231211 is an apocalyptic number.

20313231211 is a deficient number, since it is larger than the sum of its proper divisors (5713059989).

20313231211 is a wasteful number, since it uses less digits than its factorization.

20313231211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4128 (or 4121 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 20313231211 its reverse (11213231302), we get a palindrome (31526462513).

Subtracting from 20313231211 its reverse (11213231302), we obtain a palindrome (9099999909).

The spelling of 20313231211 in words is "twenty billion, three hundred thirteen million, two hundred thirty-one thousand, two hundred eleven".