20331131211 has 12 divisors (see below), whose sum is σ = 29374603440. Its totient is φ = 13550665680.

The previous prime is 20331131179. The next prime is 20331131243. The reversal of 20331131211 is 11213113302.

20331131211 is a `hidden beast` number, since 20 + 331 + 1 + 312 + 1 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (20331131179) and next prime (20331131243).

It is not a de Polignac number, because 20331131211 - 2⁵ = 20331131179 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20331131111) 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 11 ways as a sum of consecutive naturals, for example, 247255 + ... + 319056.

It is an arithmetic number, because the mean of its divisors is an integer number (2447883620).

Almost surely, 2^20331131211 is an apocalyptic number.

20331131211 is a deficient number, since it is larger than the sum of its proper divisors (9043472229).

20331131211 is a wasteful number, since it uses less digits than its factorization.

20331131211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 570306 (or 570303 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 20331131211 its reverse (11213113302), we get a palindrome (31544244513).

The spelling of 20331131211 in words is "twenty billion, three hundred thirty-one million, one hundred thirty-one thousand, two hundred eleven".