2001121201012 has 6 divisors (see below), whose sum is σ = 3501962101778. Its totient is φ = 1000560600504.

The previous prime is 2001121200989. The next prime is 2001121201039. The reversal of 2001121201012 is 2101021211002.

It can be written as a sum of positive squares in only one way, i.e., 1851194263396 + 149926937616 = 1360586^2 + 387204^2 .

It is a super-2 number, since 2×2001121201012² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2001121200983 and 2001121201001.

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, 250140150123 + ... + 250140150130.

Almost surely, 2^{2001121201012} is an apocalyptic number.

It is an amenable number.

2001121201012 is a deficient number, since it is larger than the sum of its proper divisors (1500840900766).

2001121201012 is a wasteful number, since it uses less digits than its factorization.

2001121201012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500280300257 (or 500280300255 counting only the distinct ones).

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

Adding to 2001121201012 its reverse (2101021211002), we get a palindrome (4102142412014).

The spelling of 2001121201012 in words is "two trillion, one billion, one hundred twenty-one million, two hundred one thousand, twelve".