2001012101 has 8 divisors (see below), whose sum is σ = 2204536608. Its totient is φ = 1801090000.

The previous prime is 2001012077. The next prime is 2001012103. The reversal of 2001012101 is 1012101002.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001012101 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001012103) 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, 899435 + ... + 901656.

It is an arithmetic number, because the mean of its divisors is an integer number (275567076).

Almost surely, 2^2001012101 is an apocalyptic number.

It is an amenable number.

2001012101 is a deficient number, since it is larger than the sum of its proper divisors (203524507).

2001012101 is a wasteful number, since it uses less digits than its factorization.

2001012101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1801203.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 2001012101 is about 44732.6737519679. The cubic root of 2001012101 is about 1260.1335419474.

Adding to 2001012101 its reverse (1012101002), we get a palindrome (3013113103).

It can be divided in two parts, 200101 and 2101, that added together give a palindrome (202202).

The spelling of 2001012101 in words is "two billion, one million, twelve thousand, one hundred one".