2001211201012 has 6 divisors (see below), whose sum is σ = 3502119601778. Its totient is φ = 1000605600504.

The previous prime is 2001211201009. The next prime is 2001211201079. The reversal of 2001211201012 is 2101021121002.

It can be written as a sum of positive squares in only one way, i.e., 1710168214756 + 291042986256 = 1307734^2 + 539484^2 .

It is a junction number, because it is equal to n+sod(n) for n = 2001211200983 and 2001211201001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 250151400123 + ... + 250151400130.

Almost surely, 2^{2001211201012} is an apocalyptic number.

It is an amenable number.

2001211201012 is a deficient number, since it is larger than the sum of its proper divisors (1500908400766).

2001211201012 is a wasteful number, since it uses less digits than its factorization.

2001211201012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500302800257 (or 500302800255 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 2001211201012 its reverse (2101021121002), we get a palindrome (4102232322014).

The spelling of 2001211201012 in words is "two trillion, one billion, two hundred eleven million, two hundred one thousand, twelve".