111221312203 has 4 divisors (see below), whose sum is σ = 111236872608. Its totient is φ = 111205751800.

The previous prime is 111221312201. The next prime is 111221312273. The reversal of 111221312203 is 302213122111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 302213122111 = 67141 ⋅4501171.

It is a cyclic number.

It is not a de Polignac number, because 111221312203 - 2¹ = 111221312201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221312201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7769476 + ... + 7783777.

It is an arithmetic number, because the mean of its divisors is an integer number (27809218152).

Almost surely, 2^111221312203 is an apocalyptic number.

111221312203 is a deficient number, since it is larger than the sum of its proper divisors (15560405).

111221312203 is an equidigital number, since it uses as much as digits as its factorization.

111221312203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15560404.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 111221312203 its reverse (302213122111), we get a palindrome (413434434314).

The spelling of 111221312203 in words is "one hundred eleven billion, two hundred twenty-one million, three hundred twelve thousand, two hundred three".