2001220016 has 10 divisors (see below), whose sum is σ = 3877363812. Its totient is φ = 1000610000.

The previous prime is 2001220007. The next prime is 2001220019. The reversal of 2001220016 is 6100221002.

It is not an unprimeable number, because it can be changed into a prime (2001220019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62538110 + ... + 62538141.

Almost surely, 2^2001220016 is an apocalyptic number.

It is an amenable number.

2001220016 is a deficient number, since it is larger than the sum of its proper divisors (1876143796).

2001220016 is a wasteful number, since it uses less digits than its factorization.

2001220016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125076259 (or 125076253 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 14.

The square root of 2001220016 is about 44734.9976640214. The cubic root of 2001220016 is about 1260.1771851270.

Adding to 2001220016 its reverse (6100221002), we get a palindrome (8101441018).

The spelling of 2001220016 in words is "two billion, one million, two hundred twenty thousand, sixteen".