111310123221 has 12 divisors (see below), whose sum is σ = 175397770080. Its totient is φ = 67460680680.

The previous prime is 111310123193. The next prime is 111310123229. The reversal of 111310123221 is 122321013111.

111310123221 is a `hidden beast` number, since 1 + 11 + 310 + 123 + 221 = 666.

It is not a de Polignac number, because 111310123221 - 2⁵ = 111310123189 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111310123194 and 111310123203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111310123229) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 562172241 + ... + 562172438.

It is an arithmetic number, because the mean of its divisors is an integer number (14616480840).

Almost surely, 2^111310123221 is an apocalyptic number.

111310123221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

111310123221 is a deficient number, since it is larger than the sum of its proper divisors (64087646859).

111310123221 is a wasteful number, since it uses less digits than its factorization.

111310123221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1124344696 (or 1124344693 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 111310123221 its reverse (122321013111), we get a palindrome (233631136332).

The spelling of 111310123221 in words is "one hundred eleven billion, three hundred ten million, one hundred twenty-three thousand, two hundred twenty-one".