1213404411 has 4 divisors (see below), whose sum is σ = 1617872552. Its totient is φ = 808936272.

The previous prime is 1213404403. The next prime is 1213404433. The reversal of 1213404411 is 1144043121.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1213404411 - 2³ = 1213404403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1213404481) 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, 202234066 + ... + 202234071.

It is an arithmetic number, because the mean of its divisors is an integer number (404468138).

Almost surely, 2^1213404411 is an apocalyptic number.

1213404411 is a deficient number, since it is larger than the sum of its proper divisors (404468141).

1213404411 is an equidigital number, since it uses as much as digits as its factorization.

1213404411 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404468140.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 1213404411 is about 34833.9548572941. The cubic root of 1213404411 is about 1066.6006805643.

Adding to 1213404411 its reverse (1144043121), we get a palindrome (2357447532).

It can be divided in two parts, 121340 and 4411, that added together give a triangular number (125751 = T₅₀₁).

The spelling of 1213404411 in words is "one billion, two hundred thirteen million, four hundred four thousand, four hundred eleven".