1011111222112 has 48 divisors (see below), whose sum is σ = 2002116517632. Its totient is φ = 502640020480.

The previous prime is 1011111222101. The next prime is 1011111222113. The reversal of 1011111222112 is 2112221111101.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1011111222113) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11649018 + ... + 11735494.

It is an arithmetic number, because the mean of its divisors is an integer number (41710760784).

Almost surely, 2^{1011111222112} is an apocalyptic number.

It is an amenable number.

1011111222112 is a deficient number, since it is larger than the sum of its proper divisors (991005295520).

1011111222112 is a wasteful number, since it uses less digits than its factorization.

1011111222112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88591 (or 88583 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 16.

Adding to 1011111222112 its reverse (2112221111101), we get a palindrome (3123332333213).

The spelling of 1011111222112 in words is "one trillion, eleven billion, one hundred eleven million, two hundred twenty-two thousand, one hundred twelve".