2001001011201 has 32 divisors (see below), whose sum is σ = 3068258659200. Its totient is φ = 1287332665920.

The previous prime is 2001001011197. The next prime is 2001001011203. The reversal of 2001001011201 is 1021101001002.

It is a happy number.

It is not a de Polignac number, because 2001001011201 - 2² = 2001001011197 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 (2001001011203) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 850255 + ... + 2173691.

It is an arithmetic number, because the mean of its divisors is an integer number (95883083100).

Almost surely, 2^{2001001011201} is an apocalyptic number.

It is an amenable number.

2001001011201 is a deficient number, since it is larger than the sum of its proper divisors (1067257647999).

2001001011201 is a wasteful number, since it uses less digits than its factorization.

2001001011201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1325406 (or 1325400 counting only the distinct ones).

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

Adding to 2001001011201 its reverse (1021101001002), we get a palindrome (3022102012203).

The spelling of 2001001011201 in words is "two trillion, one billion, one million, eleven thousand, two hundred one".