201201112111001 has 2 divisors, whose sum is σ = 201201112111002. Its totient is φ = 201201112111000.

The previous prime is 201201112110923. The next prime is 201201112111019. The reversal of 201201112111001 is 100111211102102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 128357003775625 + 72844108335376 = 11329475^2 + 8534876^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201201112111001 is a prime.

It is not a weakly prime, because it can be changed into another prime (201201112111061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100600556055500 + 100600556055501.

It is an arithmetic number, because the mean of its divisors is an integer number (100600556055501).

Almost surely, 2^{201201112111001} is an apocalyptic number.

It is an amenable number.

201201112111001 is a deficient number, since it is larger than the sum of its proper divisors (1).

201201112111001 is an equidigital number, since it uses as much as digits as its factorization.

201201112111001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 201201112111001 its reverse (100111211102102), we get a palindrome (301312323213103).

It can be divided in two parts, 20 and 1201112111001, that added together give a palindrome (1201112111021).

The spelling of 201201112111001 in words is "two hundred one trillion, two hundred one billion, one hundred twelve million, one hundred eleven thousand, one".