20010231211 has 2 divisors, whose sum is σ = 20010231212. Its totient is φ = 20010231210.

The previous prime is 20010231161. The next prime is 20010231221. The reversal of 20010231211 is 11213201002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20010231211 - 2¹¹ = 20010229163 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20010231191 and 20010231200.

It is not a weakly prime, because it can be changed into another prime (20010231221) 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 as a sum of consecutive naturals, namely, 10005115605 + 10005115606.

It is an arithmetic number, because the mean of its divisors is an integer number (10005115606).

Almost surely, 2^20010231211 is an apocalyptic number.

20010231211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20010231211 is an equidigital number, since it uses as much as digits as its factorization.

20010231211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

Adding to 20010231211 its reverse (11213201002), we get a palindrome (31223432213).

The spelling of 20010231211 in words is "twenty billion, ten million, two hundred thirty-one thousand, two hundred eleven".