2001220201012 has 6 divisors (see below), whose sum is σ = 3502135351778. Its totient is φ = 1000610100504.

The previous prime is 2001220201007. The next prime is 2001220201073. The reversal of 2001220201012 is 2101020221002.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1957687882276 + 43532318736 = 1399174^2 + 208644^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2001220200983 and 2001220201001.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250152525123 + ... + 250152525130.

Almost surely, 2^{2001220201012} is an apocalyptic number.

It is an amenable number.

2001220201012 is a deficient number, since it is larger than the sum of its proper divisors (1500915150766).

2001220201012 is a wasteful number, since it uses less digits than its factorization.

2001220201012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500305050257 (or 500305050255 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 2001220201012 its reverse (2101020221002), we get a palindrome (4102240422014).

The spelling of 2001220201012 in words is "two trillion, one billion, two hundred twenty million, two hundred one thousand, twelve".