2001021149 has 2 divisors, whose sum is σ = 2001021150. Its totient is φ = 2001021148.

The previous prime is 2001021109. The next prime is 2001021163. The reversal of 2001021149 is 9411201002.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1922822500 + 78198649 = 43850^2 + 8843^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001021149 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2001021149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001021109) 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 as a sum of consecutive naturals, namely, 1000510574 + 1000510575.

It is an arithmetic number, because the mean of its divisors is an integer number (1000510575).

Almost surely, 2^2001021149 is an apocalyptic number.

It is an amenable number.

2001021149 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001021149 is an equidigital number, since it uses as much as digits as its factorization.

2001021149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 2001021149 is about 44732.7748859826. The cubic root of 2001021149 is about 1260.1354412648.

The spelling of 2001021149 in words is "two billion, one million, twenty-one thousand, one hundred forty-nine".