1111221122123 has 16 divisors (see below), whose sum is σ = 1340449950720. Its totient is φ = 899886226176.

The previous prime is 1111221122029. The next prime is 1111221122147. The reversal of 1111221122123 is 3212211221111.

It is not a de Polignac number, because 1111221122123 - 2¹⁰ = 1111221121099 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111221122095 and 1111221122104.

It is not an unprimeable number, because it can be changed into a prime (1111221122923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11334086 + ... + 11431707.

It is an arithmetic number, because the mean of its divisors is an integer number (83778121920).

Almost surely, 2^{1111221122123} is an apocalyptic number.

1111221122123 is a deficient number, since it is larger than the sum of its proper divisors (229228828597).

1111221122123 is a wasteful number, since it uses less digits than its factorization.

1111221122123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22766186.

The product of its digits is 96, while the sum is 20.

Adding to 1111221122123 its reverse (3212211221111), we get a palindrome (4323432343234).

The spelling of 1111221122123 in words is "one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred twenty-two thousand, one hundred twenty-three".