11111221244331 has 16 divisors (see below), whose sum is σ = 17727304549920. Its totient is φ = 6837674611680.

The previous prime is 11111221244317. The next prime is 11111221244371. The reversal of 11111221244331 is 13344212211111.

11111221244331 is a `hidden beast` number, since 1 + 1 + 1 + 1 + 1 + 2 + 212 + 443 + 3 + 1 = 666.

It is not a de Polignac number, because 11111221244331 - 2⁶ = 11111221244267 is a prime.

It is a super-2 number, since 2×11111221244331² (a number of 27 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 11111221244295 and 11111221244304.

It is not an unprimeable number, because it can be changed into a prime (11111221244371) 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 15 ways as a sum of consecutive naturals, for example, 15827950140 + ... + 15827950841.

It is an arithmetic number, because the mean of its divisors is an integer number (1107956534370).

Almost surely, 2^{11111221244331} is an apocalyptic number.

11111221244331 is a deficient number, since it is larger than the sum of its proper divisors (6616083305589).

11111221244331 is a wasteful number, since it uses less digits than its factorization.

11111221244331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31655901003 (or 31655900997 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

Adding to 11111221244331 its reverse (13344212211111), we get a palindrome (24455433455442).

The spelling of 11111221244331 in words is "eleven trillion, one hundred eleven billion, two hundred twenty-one million, two hundred forty-four thousand, three hundred thirty-one".