1223110113156 has 144 divisors (see below), whose sum is σ = 3286465902720. Its totient is φ = 382711802880.

The previous prime is 1223110113131. The next prime is 1223110113187. The reversal of 1223110113156 is 6513110113221.

1223110113156 is a `hidden beast` number, since 1 + 22 + 311 + 0 + 11 + 315 + 6 = 666.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 28948126 + ... + 28990346.

It is an arithmetic number, because the mean of its divisors is an integer number (22822679880).

Almost surely, 2^{1223110113156} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223110113156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1643232951360).

1223110113156 is an abundant number, since it is smaller than the sum of its proper divisors (2063355789564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223110113156 is a wasteful number, since it uses less digits than its factorization.

1223110113156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42906 (or 42901 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

Adding to 1223110113156 its reverse (6513110113221), we get a palindrome (7736220226377).

The spelling of 1223110113156 in words is "one trillion, two hundred twenty-three billion, one hundred ten million, one hundred thirteen thousand, one hundred fifty-six".