11131221404 has 24 divisors (see below), whose sum is σ = 20330352000. Its totient is φ = 5322639344.

The previous prime is 11131221403. The next prime is 11131221469. The reversal of 11131221404 is 40412213111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131221401) 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, 817847 + ... + 831345.

It is an arithmetic number, because the mean of its divisors is an integer number (847098000).

Almost surely, 2^11131221404 is an apocalyptic number.

It is an amenable number.

11131221404 is a deficient number, since it is larger than the sum of its proper divisors (9199130596).

11131221404 is a wasteful number, since it uses less digits than its factorization.

11131221404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22489 (or 22487 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 11131221404 its reverse (40412213111), we get a palindrome (51543434515).

The spelling of 11131221404 in words is "eleven billion, one hundred thirty-one million, two hundred twenty-one thousand, four hundred four".