211231120211 has 2 divisors, whose sum is σ = 211231120212. Its totient is φ = 211231120210.

The previous prime is 211231120151. The next prime is 211231120223. The reversal of 211231120211 is 112021132112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211231120211 - 2¹⁸ = 211230858067 is a prime.

It is a super-2 number, since 2×211231120211² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 211231120211.

It is not a weakly prime, because it can be changed into another prime (211231120231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105615560105 + 105615560106.

It is an arithmetic number, because the mean of its divisors is an integer number (105615560106).

Almost surely, 2^211231120211 is an apocalyptic number.

211231120211 is a deficient number, since it is larger than the sum of its proper divisors (1).

211231120211 is an equidigital number, since it uses as much as digits as its factorization.

211231120211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 211231120211 its reverse (112021132112), we get a palindrome (323252252323).

The spelling of 211231120211 in words is "two hundred eleven billion, two hundred thirty-one million, one hundred twenty thousand, two hundred eleven".