1211121200211 has 32 divisors (see below), whose sum is σ = 1747832013312. Its totient is φ = 741545418240.

The previous prime is 1211121200189. The next prime is 1211121200251. The reversal of 1211121200211 is 1120021211121.

It is a happy number.

It is not a de Polignac number, because 1211121200211 - 2¹⁰ = 1211121199187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1211121200251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10497706 + ... + 10612448.

It is an arithmetic number, because the mean of its divisors is an integer number (54619750416).

Almost surely, 2^{1211121200211} is an apocalyptic number.

1211121200211 is a deficient number, since it is larger than the sum of its proper divisors (536710813101).

1211121200211 is a wasteful number, since it uses less digits than its factorization.

1211121200211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116123.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 1211121200211 its reverse (1120021211121), we get a palindrome (2331142411332).

The spelling of 1211121200211 in words is "one trillion, two hundred eleven billion, one hundred twenty-one million, two hundred thousand, two hundred eleven".