1111413221 has 4 divisors (see below), whose sum is σ = 1123901100. Its totient is φ = 1098925344.

The previous prime is 1111413211. The next prime is 1111413241. The reversal of 1111413221 is 1223141111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1223141111 = 307 ⋅3984173.

It can be written as a sum of positive squares in 2 ways, for example, as 604668100 + 506745121 = 24590^2 + 22511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1111413221 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 1111413221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111413211) 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, 6243806 + ... + 6243983.

It is an arithmetic number, because the mean of its divisors is an integer number (280975275).

Almost surely, 2^1111413221 is an apocalyptic number.

It is an amenable number.

1111413221 is a deficient number, since it is larger than the sum of its proper divisors (12487879).

1111413221 is an equidigital number, since it uses as much as digits as its factorization.

1111413221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12487878.

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

The square root of 1111413221 is about 33337.8646736710. The cubic root of 1111413221 is about 1035.8380327113.

Adding to 1111413221 its reverse (1223141111), we get a palindrome (2334554332).

The spelling of 1111413221 in words is "one billion, one hundred eleven million, four hundred thirteen thousand, two hundred twenty-one".