111212212403 has 16 divisors (see below), whose sum is σ = 121751731200. Its totient is φ = 101221656480.

The previous prime is 111212212393. The next prime is 111212212411. The reversal of 111212212403 is 304212212111.

It is a cyclic number.

It is not a de Polignac number, because 111212212403 - 2⁴ = 111212212387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111212212483) 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, 1065923 + ... + 1165596.

It is an arithmetic number, because the mean of its divisors is an integer number (7609483200).

Almost surely, 2^111212212403 is an apocalyptic number.

111212212403 is a deficient number, since it is larger than the sum of its proper divisors (10539518797).

111212212403 is a wasteful number, since it uses less digits than its factorization.

111212212403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2231642.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 111212212403 its reverse (304212212111), we get a palindrome (415424424514).

The spelling of 111212212403 in words is "one hundred eleven billion, two hundred twelve million, two hundred twelve thousand, four hundred three".