2001020143 has 2 divisors, whose sum is σ = 2001020144. Its totient is φ = 2001020142.

The previous prime is 2001020137. The next prime is 2001020183. The reversal of 2001020143 is 3410201002.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2001020143 is a prime.

It is a super-2 number, since 2×2001020143² = 8008163225383480898, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2001020183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1000510071 + 1000510072.

It is an arithmetic number, because the mean of its divisors is an integer number (1000510072).

Almost surely, 2^2001020143 is an apocalyptic number.

2001020143 is a deficient number, since it is larger than the sum of its proper divisors (1).

2001020143 is an equidigital number, since it uses as much as digits as its factorization.

2001020143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2001020143 is about 44732.7636414295. The cubic root of 2001020143 is about 1260.1352300899.

Adding to 2001020143 its reverse (3410201002), we get a palindrome (5411221145).

The spelling of 2001020143 in words is "two billion, one million, twenty thousand, one hundred forty-three".