201101021001 has 16 divisors (see below), whose sum is σ = 297938099520. Its totient is φ = 134062549920.

The previous prime is 201101020999. The next prime is 201101021021. The reversal of 201101021001 is 100120101102.

It is a happy number.

201101021001 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 201101021001 - 2¹ = 201101020999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (201101021021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 739066 + ... + 973868.

It is an arithmetic number, because the mean of its divisors is an integer number (18621131220).

Almost surely, 2^201101021001 is an apocalyptic number.

It is an amenable number.

201101021001 is a deficient number, since it is larger than the sum of its proper divisors (96837078519).

201101021001 is a wasteful number, since it uses less digits than its factorization.

201101021001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266533 (or 266527 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 201101021001 its reverse (100120101102), we get a palindrome (301221122103).

The spelling of 201101021001 in words is "two hundred one billion, one hundred one million, twenty-one thousand, one".