1121121212211 has 288 divisors, whose sum is σ = 2321523929088. Its totient is φ = 511891591680.

The previous prime is 1121121212209. The next prime is 1121121212219. The reversal of 1121121212211 is 1122121211211.

It is a happy number.

1121121212211 is a `hidden beast` number, since 1 + 121 + 121 + 212 + 211 = 666.

It is not a de Polignac number, because 1121121212211 - 2¹ = 1121121212209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121121212219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 109661446 + ... + 109671668.

It is an arithmetic number, because the mean of its divisors is an integer number (8060846976).

Almost surely, 2^{1121121212211} is an apocalyptic number.

1121121212211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1121121212211 is an abundant number, since it is smaller than the sum of its proper divisors (1200402716877).

1121121212211 is a wasteful number, since it uses less digits than its factorization.

1121121212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10351 (or 10341 counting only the distinct ones).

The product of its digits is 32, while the sum is 18.

Adding to 1121121212211 its reverse (1122121211211), we get a palindrome (2243242423422).

The spelling of 1121121212211 in words is "one trillion, one hundred twenty-one billion, one hundred twenty-one million, two hundred twelve thousand, two hundred eleven".