1122121112211 has 32 divisors (see below), whose sum is σ = 1822925687040. Its totient is φ = 676549670400.

The previous prime is 1122121112183. The next prime is 1122121112251. The reversal of 1122121112211 is 1122111212211.

It is a happy number.

1122121112211 is a `hidden beast` number, since 11 + 221 + 211 + 1 + 221 + 1 = 666.

It is not a de Polignac number, because 1122121112211 - 2⁷ = 1122121112083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1122121112251) 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 31 ways as a sum of consecutive naturals, for example, 9730725 + ... + 9845366.

It is an arithmetic number, because the mean of its divisors is an integer number (56966427720).

Almost surely, 2^{1122121112211} is an apocalyptic number.

1122121112211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1122121112211 is a deficient number, since it is larger than the sum of its proper divisors (700804574829).

1122121112211 is a wasteful number, since it uses less digits than its factorization.

1122121112211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19576304 (or 19576298 counting only the distinct ones).

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

Adding to 1122121112211 its reverse (1122111212211), we get a palindrome (2244232324422).

The spelling of 1122121112211 in words is "one trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred twelve thousand, two hundred eleven".