1121221100211 has 16 divisors (see below), whose sum is σ = 1546542487200. Its totient is φ = 721691244288.

The previous prime is 1121221100203. The next prime is 1121221100221. The reversal of 1121221100211 is 1120011221211.

It is a happy number.

It is not a de Polignac number, because 1121221100211 - 2³ = 1121221100203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121221100221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5939385 + ... + 6125253.

It is an arithmetic number, because the mean of its divisors is an integer number (96658905450).

Almost surely, 2^{1121221100211} is an apocalyptic number.

1121221100211 is a deficient number, since it is larger than the sum of its proper divisors (425321386989).

1121221100211 is a wasteful number, since it uses less digits than its factorization.

1121221100211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255238.

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

Adding to 1121221100211 its reverse (1120011221211), we get a palindrome (2241232321422).

The spelling of 1121221100211 in words is "one trillion, one hundred twenty-one billion, two hundred twenty-one million, one hundred thousand, two hundred eleven".