2101211221012 has 6 divisors (see below), whose sum is σ = 3677119636778. Its totient is φ = 1050605610504.

The previous prime is 2101211221001. The next prime is 2101211221033. The reversal of 2101211221012 is 2101221121012.

It can be written as a sum of positive squares in only one way, i.e., 2023773688836 + 77437532176 = 1422594^2 + 278276^2 .

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, 262651402623 + ... + 262651402630.

Almost surely, 2^{2101211221012} is an apocalyptic number.

It is an amenable number.

2101211221012 is a deficient number, since it is larger than the sum of its proper divisors (1575908415766).

2101211221012 is a wasteful number, since it uses less digits than its factorization.

2101211221012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 525302805257 (or 525302805255 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 2101211221012 its reverse (2101221121012), we get a palindrome (4202432342024).

The spelling of 2101211221012 in words is "two trillion, one hundred one billion, two hundred eleven million, two hundred twenty-one thousand, twelve".