201211323001 has 16 divisors (see below), whose sum is σ = 218895198480. Its totient is φ = 183846942720.

The previous prime is 201211322971. The next prime is 201211323011. The reversal of 201211323001 is 100323112102.

It can be written as a sum of positive squares in 8 ways, for example, as 123538190400 + 77673132601 = 351480^2 + 278699^2 .

It is a cyclic number.

It is not a de Polignac number, because 201211323001 - 2¹¹ = 201211320953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201211323011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1027915 + ... + 1207903.

It is an arithmetic number, because the mean of its divisors is an integer number (13680949905).

Almost surely, 2^201211323001 is an apocalyptic number.

It is an amenable number.

201211323001 is a deficient number, since it is larger than the sum of its proper divisors (17683875479).

201211323001 is a wasteful number, since it uses less digits than its factorization.

201211323001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180876.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 201211323001 its reverse (100323112102), we get a palindrome (301534435103).

The spelling of 201211323001 in words is "two hundred one billion, two hundred eleven million, three hundred twenty-three thousand, one".