11111221020203 has 2 divisors, whose sum is σ = 11111221020204. Its totient is φ = 11111221020202.

The previous prime is 11111221020181. The next prime is 11111221020247. The reversal of 11111221020203 is 30202012211111.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11111221020203 - 2¹⁰ = 11111221019179 is a prime.

It is a super-2 number, since 2×11111221020203² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11111221050203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555610510101 + 5555610510102.

It is an arithmetic number, because the mean of its divisors is an integer number (5555610510102).

Almost surely, 2^{11111221020203} is an apocalyptic number.

11111221020203 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111221020203 is an equidigital number, since it uses as much as digits as its factorization.

11111221020203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48, while the sum is 17.

Adding to 11111221020203 its reverse (30202012211111), we get a palindrome (41313233231314).

The spelling of 11111221020203 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-one million, twenty thousand, two hundred three".