201211020001 has 8 divisors (see below), whose sum is σ = 213067531944. Its totient is φ = 189356793600.

The previous prime is 201211019951. The next prime is 201211020013. The reversal of 201211020001 is 100020112102.

It can be written as a sum of positive squares in 4 ways, for example, as 91533477025 + 109677542976 = 302545^2 + 331176^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 201211020001 - 2⁷ = 201211019873 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201211020001.

It is not an unprimeable number, because it can be changed into a prime (201211020041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 388450 + ... + 743851.

It is an arithmetic number, because the mean of its divisors is an integer number (26633441493).

Almost surely, 2^201211020001 is an apocalyptic number.

It is an amenable number.

201211020001 is a deficient number, since it is larger than the sum of its proper divisors (11856511943).

201211020001 is a wasteful number, since it uses less digits than its factorization.

201211020001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142771.

The product of its (nonzero) digits is 8, while the sum is 10.

Adding to 201211020001 its reverse (100020112102), we get a palindrome (301231132103).

The spelling of 201211020001 in words is "two hundred one billion, two hundred eleven million, twenty thousand, one".