11111221012203 has 12 divisors (see below), whose sum is σ = 17284121574720. Its totient is φ = 6837674468976.

The previous prime is 11111221012201. The next prime is 11111221012207. The reversal of 11111221012203 is 30221012211111.

It is a happy number.

It is not a de Polignac number, because 11111221012203 - 2¹ = 11111221012201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11111221012201) 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, 47483850363 + ... + 47483850596.

It is an arithmetic number, because the mean of its divisors is an integer number (1440343464560).

Almost surely, 2^{11111221012203} is an apocalyptic number.

11111221012203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

11111221012203 is a deficient number, since it is larger than the sum of its proper divisors (6172900562517).

11111221012203 is a wasteful number, since it uses less digits than its factorization.

11111221012203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94967700978 (or 94967700975 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 11111221012203 its reverse (30221012211111), we get a palindrome (41332233223314).

The spelling of 11111221012203 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-one million, twelve thousand, two hundred three".