1120111221 has 4 divisors (see below), whose sum is σ = 1493481632. Its totient is φ = 746740812.

The previous prime is 1120111211. The next prime is 1120111229. The reversal of 1120111221 is 1221110211.

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.

It is not a de Polignac number, because 1120111221 - 2¹¹ = 1120109173 is a prime.

It is a super-2 number, since 2×1120111221² = 2509298294820221682, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1120111197 and 1120111206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1120111229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186685201 + ... + 186685206.

It is an arithmetic number, because the mean of its divisors is an integer number (373370408).

Almost surely, 2^1120111221 is an apocalyptic number.

It is an amenable number.

1120111221 is a deficient number, since it is larger than the sum of its proper divisors (373370411).

1120111221 is an equidigital number, since it uses as much as digits as its factorization.

1120111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 373370410.

The product of its (nonzero) digits is 8, while the sum is 12.

The square root of 1120111221 is about 33468.0627016265. The cubic root of 1120111221 is about 1038.5331950887.

Adding to 1120111221 its reverse (1221110211), we get a palindrome (2341221432).

It can be divided in two parts, 11201 and 11221, that added together give a palindrome (22422).

The spelling of 1120111221 in words is "one billion, one hundred twenty million, one hundred eleven thousand, two hundred twenty-one".