201331201111 has 2 divisors, whose sum is σ = 201331201112. Its totient is φ = 201331201110.

The previous prime is 201331201067. The next prime is 201331201147. The reversal of 201331201111 is 111102133102.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 201331201111 - 2¹³ = 201331192919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201331201811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100665600555 + 100665600556.

It is an arithmetic number, because the mean of its divisors is an integer number (100665600556).

Almost surely, 2^201331201111 is an apocalyptic number.

201331201111 is a deficient number, since it is larger than the sum of its proper divisors (1).

201331201111 is an equidigital number, since it uses as much as digits as its factorization.

201331201111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 201331201111 its reverse (111102133102), we get a palindrome (312433334213).

The spelling of 201331201111 in words is "two hundred one billion, three hundred thirty-one million, two hundred one thousand, one hundred eleven".