111113313331221 has 12 divisors (see below), whose sum is σ = 160497189441472. Its totient is φ = 74075458545576.

The previous prime is 111113313331211. The next prime is 111113313331249. The reversal of 111113313331221 is 122133313311111.

111113313331221 is a `hidden beast` number, since 1 + 1 + 1 + 1 + 13 + 313 + 3 + 312 + 21 = 666.

It is not a de Polignac number, because 111113313331221 - 2⁶ = 111113313331157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111113313331211) 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 11 ways as a sum of consecutive naturals, for example, 2051940 + ... + 15047826.

Almost surely, 2^{111113313331221} is an apocalyptic number.

It is an amenable number.

111113313331221 is a deficient number, since it is larger than the sum of its proper divisors (49383876110251).

111113313331221 is a wasteful number, since it uses less digits than its factorization.

111113313331221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13945880 (or 13945877 counting only the distinct ones).

The product of its digits is 972, while the sum is 27.

Adding to 111113313331221 its reverse (122133313311111), we get a palindrome (233246626642332).

The spelling of 111113313331221 in words is "one hundred eleven trillion, one hundred thirteen billion, three hundred thirteen million, three hundred thirty-one thousand, two hundred twenty-one".