11211211221002 has 16 divisors (see below), whose sum is σ = 18552135643272. Its totient is φ = 5048200174080.

The previous prime is 11211211220981. The next prime is 11211211221019. The reversal of 11211211221002 is 20012211211211.

It can be written as a sum of positive squares in 4 ways, for example, as 2049275277841 + 9161935943161 = 1431529^2 + 3026869^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5258540783 + ... + 5258542914.

Almost surely, 2^{11211211221002} is an apocalyptic number.

11211211221002 is a deficient number, since it is larger than the sum of its proper divisors (7340924422270).

11211211221002 is a wasteful number, since it uses less digits than its factorization.

11211211221002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10517083753.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 11211211221002 its reverse (20012211211211), we get a palindrome (31223422432213).

The spelling of 11211211221002 in words is "eleven trillion, two hundred eleven billion, two hundred eleven million, two hundred twenty-one thousand, two".