2001129701 has 6 divisors (see below), whose sum is σ = 2067765606. Its totient is φ = 1936576200.

The previous prime is 2001129677. The next prime is 2001129773. The reversal of 2001129701 is 1079211002.

It can be written as a sum of positive squares in only one way, i.e., 1501562500 + 499567201 = 38750^2 + 22351^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2001129701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2001129791) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1040210 + ... + 1042131.

It is an arithmetic number, because the mean of its divisors is an integer number (344627601).

Almost surely, 2^2001129701 is an apocalyptic number.

It is an amenable number.

2001129701 is a deficient number, since it is larger than the sum of its proper divisors (66635905).

2001129701 is an equidigital number, since it uses as much as digits as its factorization.

2001129701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2082403 (or 2082372 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 23.

The square root of 2001129701 is about 44733.9882080728. The cubic root of 2001129701 is about 1260.1582275888.

The spelling of 2001129701 in words is "two billion, one million, one hundred twenty-nine thousand, seven hundred one".