1111111022121 has 8 divisors (see below), whose sum is σ = 1482431645760. Its totient is φ = 740265539952.

The previous prime is 1111111022107. The next prime is 1111111022141. The reversal of 1111111022121 is 1212201111111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1111111022121 - 2³⁹ = 561355208233 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1111111022121.

It is not an unprimeable number, because it can be changed into a prime (1111111022141) 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 7 ways as a sum of consecutive naturals, for example, 118779910 + ... + 118789263.

It is an arithmetic number, because the mean of its divisors is an integer number (185303955720).

Almost surely, 2^{1111111022121} is an apocalyptic number.

It is an amenable number.

1111111022121 is a deficient number, since it is larger than the sum of its proper divisors (371320623639).

1111111022121 is a wasteful number, since it uses less digits than its factorization.

1111111022121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237570735.

The product of its (nonzero) digits is 8, while the sum is 15.

Adding to 1111111022121 its reverse (1212201111111), we get a palindrome (2323312133232).

The spelling of 1111111022121 in words is "one trillion, one hundred eleven billion, one hundred eleven million, twenty-two thousand, one hundred twenty-one".