1111541421 has 4 divisors (see below), whose sum is σ = 1482055232. Its totient is φ = 741027612.

The previous prime is 1111541369. The next prime is 1111541429. The reversal of 1111541421 is 1241451111.

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 1111541421 - 2⁷ = 1111541293 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 (1111541429) 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, 185256901 + ... + 185256906.

It is an arithmetic number, because the mean of its divisors is an integer number (370513808).

Almost surely, 2^1111541421 is an apocalyptic number.

It is an amenable number.

1111541421 is a deficient number, since it is larger than the sum of its proper divisors (370513811).

1111541421 is an equidigital number, since it uses as much as digits as its factorization.

1111541421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370513810.

The product of its digits is 160, while the sum is 21.

The square root of 1111541421 is about 33339.7873568504. The cubic root of 1111541421 is about 1035.8778586818.

Adding to 1111541421 its reverse (1241451111), we get a palindrome (2352992532).

It can be divided in two parts, 111154 and 1421, that added together give a triangular number (112575 = T₄₇₄).

The spelling of 1111541421 in words is "one billion, one hundred eleven million, five hundred forty-one thousand, four hundred twenty-one".