111031113221 has 4 divisors (see below), whose sum is σ = 126892700832. Its totient is φ = 95169525612.

The previous prime is 111031113211. The next prime is 111031113223. The reversal of 111031113221 is 122311130111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122311130111 = 389 ⋅314424499.

It is not a de Polignac number, because 111031113221 - 2²⁶ = 110964004357 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 111031113221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111031113223) 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 3 ways as a sum of consecutive naturals, for example, 7930793795 + ... + 7930793808.

It is an arithmetic number, because the mean of its divisors is an integer number (31723175208).

Almost surely, 2^111031113221 is an apocalyptic number.

It is an amenable number.

111031113221 is a deficient number, since it is larger than the sum of its proper divisors (15861587611).

111031113221 is an equidigital number, since it uses as much as digits as its factorization.

111031113221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15861587610.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 111031113221 its reverse (122311130111), we get a palindrome (233342243332).

The spelling of 111031113221 in words is "one hundred eleven billion, thirty-one million, one hundred thirteen thousand, two hundred twenty-one".