11122121111121 has 32 divisors (see below), whose sum is σ = 16572116695680. Its totient is φ = 7372156966848.

The previous prime is 11122121111069. The next prime is 11122121111159. The reversal of 11122121111121 is 12111112122111.

11122121111121 is a `hidden beast` number, since 111 + 221 + 211 + 1 + 1 + 121 = 666.

It is not a de Polignac number, because 11122121111121 - 2¹⁴ = 11122121094737 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11122121111094 and 11122121111103.

It is not an unprimeable number, because it can be changed into a prime (11122121111021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1900495 + ... + 5084891.

It is an arithmetic number, because the mean of its divisors is an integer number (517878646740).

Almost surely, 2^{11122121111121} is an apocalyptic number.

It is an amenable number.

11122121111121 is a deficient number, since it is larger than the sum of its proper divisors (5449995584559).

11122121111121 is a wasteful number, since it uses less digits than its factorization.

11122121111121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3185150 (or 3185144 counting only the distinct ones).

The product of its digits is 16, while the sum is 18.

Adding to 11122121111121 its reverse (12111112122111), we get a palindrome (23233233233232).

The spelling of 11122121111121 in words is "eleven trillion, one hundred twenty-two billion, one hundred twenty-one million, one hundred eleven thousand, one hundred twenty-one".