111203323121 has 16 divisors (see below), whose sum is σ = 125566243200. Its totient is φ = 97553232000.

The previous prime is 111203323087. The next prime is 111203323129. The reversal of 111203323121 is 121323302111.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111203323121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111203323093 and 111203323102.

It is not an unprimeable number, because it can be changed into a prime (111203323129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 477740 + ... + 671298.

It is an arithmetic number, because the mean of its divisors is an integer number (7847890200).

Almost surely, 2^111203323121 is an apocalyptic number.

111203323121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111203323121 is a deficient number, since it is larger than the sum of its proper divisors (14362920079).

111203323121 is a wasteful number, since it uses less digits than its factorization.

111203323121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195400.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 111203323121 its reverse (121323302111), we get a palindrome (232526625232).

The spelling of 111203323121 in words is "one hundred eleven billion, two hundred three million, three hundred twenty-three thousand, one hundred twenty-one".