1113212405 has 16 divisors (see below), whose sum is σ = 1367607024. Its totient is φ = 869644800.

The previous prime is 1113212389. The next prime is 1113212431. The reversal of 1113212405 is 5042123111.

It can be written as a sum of positive squares in 8 ways, for example, as 18992164 + 1094220241 = 4358^2 + 33079^2 .

It is not a de Polignac number, because 1113212405 - 2⁴ = 1113212389 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21767 + ... + 51963.

It is an arithmetic number, because the mean of its divisors is an integer number (85475439).

Almost surely, 2^1113212405 is an apocalyptic number.

It is an amenable number.

1113212405 is a deficient number, since it is larger than the sum of its proper divisors (254394619).

1113212405 is a wasteful number, since it uses less digits than its factorization.

1113212405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30376.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1113212405 is about 33364.8378536447. The cubic root of 1113212405 is about 1036.3966783572.

Adding to 1113212405 its reverse (5042123111), we get a palindrome (6155335516).

The spelling of 1113212405 in words is "one billion, one hundred thirteen million, two hundred twelve thousand, four hundred five".