1121211012211 has 4 divisors (see below), whose sum is σ = 1131133233672. Its totient is φ = 1111288790752.

The previous prime is 1121211012203. The next prime is 1121211012293. The reversal of 1121211012211 is 1122101121211.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1121211012211 - 2³ = 1121211012203 is a prime.

It is a super-2 number, since 2×1121211012211² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1121211012511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4961110561 + ... + 4961110786.

It is an arithmetic number, because the mean of its divisors is an integer number (282783308418).

Almost surely, 2^{1121211012211} is an apocalyptic number.

1121211012211 is a deficient number, since it is larger than the sum of its proper divisors (9922221461).

1121211012211 is an equidigital number, since it uses as much as digits as its factorization.

1121211012211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9922221460.

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

Adding to 1121211012211 its reverse (1122101121211), we get a palindrome (2243312133422).

The spelling of 1121211012211 in words is "one trillion, one hundred twenty-one billion, two hundred eleven million, twelve thousand, two hundred eleven".