2001220043 has 8 divisors (see below), whose sum is σ = 2061510000. Its totient is φ = 1941555168.

The previous prime is 2001220027. The next prime is 2001220051. The reversal of 2001220043 is 3400221002.

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

It is a cyclic number.

It is not a de Polignac number, because 2001220043 - 2⁴ = 2001220027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2001220843) 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, 149768 + ... + 162581.

It is an arithmetic number, because the mean of its divisors is an integer number (257688750).

Almost surely, 2^2001220043 is an apocalyptic number.

2001220043 is a deficient number, since it is larger than the sum of its proper divisors (60289957).

2001220043 is a wasteful number, since it uses less digits than its factorization.

2001220043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312541.

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 2001220043 is about 44734.9979657985. The cubic root of 2001220043 is about 1260.1771907944.

Adding to 2001220043 its reverse (3400221002), we get a palindrome (5401441045).

The spelling of 2001220043 in words is "two billion, one million, two hundred twenty thousand, forty-three".