1113221541 has 4 divisors (see below), whose sum is σ = 1484295392. Its totient is φ = 742147692.

The previous prime is 1113221537. The next prime is 1113221573. The reversal of 1113221541 is 1451223111.

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 1113221541 - 2² = 1113221537 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1113221041) 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, 185536921 + ... + 185536926.

It is an arithmetic number, because the mean of its divisors is an integer number (371073848).

Almost surely, 2^1113221541 is an apocalyptic number.

It is an amenable number.

1113221541 is a deficient number, since it is larger than the sum of its proper divisors (371073851).

1113221541 is an equidigital number, since it uses as much as digits as its factorization.

1113221541 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 371073850.

The product of its digits is 240, while the sum is 21.

The square root of 1113221541 is about 33364.9747639647. The cubic root of 1113221541 is about 1036.3995135436.

Adding to 1113221541 its reverse (1451223111), we get a palindrome (2564444652).

The spelling of 1113221541 in words is "one billion, one hundred thirteen million, two hundred twenty-one thousand, five hundred forty-one".