201201210001 has 16 divisors (see below), whose sum is σ = 225084138048. Its totient is φ = 178268731200.

The previous prime is 201201209999. The next prime is 201201210037. The reversal of 201201210001 is 100012102102.

It is a cyclic number.

It is not a de Polignac number, because 201201210001 - 2¹ = 201201209999 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201201210001.

It is not an unprimeable number, because it can be changed into a prime (201201210071) 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, 243306 + ... + 679411.

It is an arithmetic number, because the mean of its divisors is an integer number (14067758628).

Almost surely, 2^201201210001 is an apocalyptic number.

It is an amenable number.

201201210001 is a deficient number, since it is larger than the sum of its proper divisors (23882928047).

201201210001 is a wasteful number, since it uses less digits than its factorization.

201201210001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923232.

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

Adding to 201201210001 its reverse (100012102102), we get a palindrome (301213312103).

The spelling of 201201210001 in words is "two hundred one billion, two hundred one million, two hundred ten thousand, one".