111021220103 has 4 divisors (see below), whose sum is σ = 111022713960. Its totient is φ = 111019726248.

The previous prime is 111021220067. The next prime is 111021220139. The reversal of 111021220103 is 301022120111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 301022120111 = 106367 ⋅2830033.

It is an interprime number because it is at equal distance from previous prime (111021220067) and next prime (111021220139).

It is a cyclic number.

It is not a de Polignac number, because 111021220103 - 2⁶ = 111021220039 is a prime.

It is a super-2 number, since 2×111021220103² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111021220903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 629273 + ... + 786146.

It is an arithmetic number, because the mean of its divisors is an integer number (27755678490).

Almost surely, 2^111021220103 is an apocalyptic number.

111021220103 is a deficient number, since it is larger than the sum of its proper divisors (1493857).

111021220103 is an equidigital number, since it uses as much as digits as its factorization.

111021220103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493856.

The product of its (nonzero) digits is 24, while the sum is 14.

Adding to 111021220103 its reverse (301022120111), we get a palindrome (412043340214).

The spelling of 111021220103 in words is "one hundred eleven billion, twenty-one million, two hundred twenty thousand, one hundred three".