103112111221 has 8 divisors (see below), whose sum is σ = 117976789760. Its totient is φ = 88281026928.

The previous prime is 103112111213. The next prime is 103112111231. The reversal of 103112111221 is 122111211301.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 103112111221 - 2³ = 103112111213 is a prime.

It is a super-2 number, since 2×103112111221² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103112111195 and 103112111204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103112111231) 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 7 ways as a sum of consecutive naturals, for example, 8391981 + ... + 8404258.

It is an arithmetic number, because the mean of its divisors is an integer number (14747098720).

Almost surely, 2^103112111221 is an apocalyptic number.

It is an amenable number.

103112111221 is a deficient number, since it is larger than the sum of its proper divisors (14864678539).

103112111221 is an equidigital number, since it uses as much as digits as its factorization.

103112111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16797123.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 103112111221 its reverse (122111211301), we get a palindrome (225223322522).

The spelling of 103112111221 in words is "one hundred three billion, one hundred twelve million, one hundred eleven thousand, two hundred twenty-one".