211201111129 has 2 divisors, whose sum is σ = 211201111130. Its totient is φ = 211201111128.

The previous prime is 211201110979. The next prime is 211201111151. The reversal of 211201111129 is 921111102112.

It is a happy number.

It is an a-pointer prime, because the next prime (211201111151) can be obtained adding 211201111129 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 145810949904 + 65390161225 = 381852^2 + 255715^2 .

It is a cyclic number.

It is not a de Polignac number, because 211201111129 - 2¹⁹ = 211200586841 is a prime.

It is not a weakly prime, because it can be changed into another prime (211201111159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105600555564 + 105600555565.

It is an arithmetic number, because the mean of its divisors is an integer number (105600555565).

Almost surely, 2^211201111129 is an apocalyptic number.

It is an amenable number.

211201111129 is a deficient number, since it is larger than the sum of its proper divisors (1).

211201111129 is an equidigital number, since it uses as much as digits as its factorization.

211201111129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 22.

The spelling of 211201111129 in words is "two hundred eleven billion, two hundred one million, one hundred eleven thousand, one hundred twenty-nine".