1111404121 has 8 divisors (see below), whose sum is σ = 1180857960. Its totient is φ = 1046022784.

The previous prime is 1111404103. The next prime is 1111404127. The reversal of 1111404121 is 1214041111.

It can be written as a sum of positive squares in 4 ways, for example, as 84842521 + 1026561600 = 9211^2 + 32040^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1111404121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1111404095 and 1111404104.

It is not an unprimeable number, because it can be changed into a prime (1111404127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108196 + ... + 118021.

It is an arithmetic number, because the mean of its divisors is an integer number (147607245).

Almost surely, 2^1111404121 is an apocalyptic number.

It is an amenable number.

1111404121 is a deficient number, since it is larger than the sum of its proper divisors (69453839).

1111404121 is an frugal number, since it uses more digits than its factorization.

1111404121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226268 (or 226234 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 1111404121 is about 33337.7281919449. The cubic root of 1111404121 is about 1035.8352056345.

Adding to 1111404121 its reverse (1214041111), we get a palindrome (2325445232).

The spelling of 1111404121 in words is "one billion, one hundred eleven million, four hundred four thousand, one hundred twenty-one".