2001011143 has 2 divisors, whose sum is σ = 2001011144. Its totient is φ = 2001011142.

The previous prime is 2001011141. The next prime is 2001011153. The reversal of 2001011143 is 3411101002.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2001011143 - 2¹ = 2001011141 is a prime.

Together with 2001011141, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001011141) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000505571 + 1000505572.

It is an arithmetic number, because the mean of its divisors is an integer number (1000505572).

Almost surely, 2^2001011143 is an apocalyptic number.

2001011143 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001011143 is an equidigital number, since it uses as much as digits as its factorization.

2001011143 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 2001011143 is about 44732.6630439101. The cubic root of 2001011143 is about 1260.1333408478.

Adding to 2001011143 its reverse (3411101002), we get a palindrome (5412112145).

The spelling of 2001011143 in words is "two billion, one million, eleven thousand, one hundred forty-three".