1121212211211 has 64 divisors (see below), whose sum is σ = 1765220688000. Its totient is φ = 700926566400.

The previous prime is 1121212211123. The next prime is 1121212211267. The reversal of 1121212211211 is 1121122121211.

It is a happy number.

1121212211211 is a `hidden beast` number, since 11 + 21 + 212 + 211 + 211 = 666.

It is not a de Polignac number, because 1121212211211 - 2¹⁷ = 1121212080139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1121212211311) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 298113571 + ... + 298117331.

It is an arithmetic number, because the mean of its divisors is an integer number (27581573250).

Almost surely, 2^{1121212211211} is an apocalyptic number.

1121212211211 is a deficient number, since it is larger than the sum of its proper divisors (644008476789).

1121212211211 is a wasteful number, since it uses less digits than its factorization.

1121212211211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5997 (or 5991 counting only the distinct ones).

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

Adding to 1121212211211 its reverse (1121122121211), we get a palindrome (2242334332422).

The spelling of 1121212211211 in words is "one trillion, one hundred twenty-one billion, two hundred twelve million, two hundred eleven thousand, two hundred eleven".