1231223404 has 12 divisors (see below), whose sum is σ = 2224145728. Its totient is φ = 595753200.

The previous prime is 1231223401. The next prime is 1231223417. The reversal of 1231223404 is 4043221321.

It is a super-2 number, since 2×1231223404² = 3031822141114694432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1231223401) 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, 4964487 + ... + 4964734.

Almost surely, 2^1231223404 is an apocalyptic number.

It is an amenable number.

1231223404 is a deficient number, since it is larger than the sum of its proper divisors (992922324).

1231223404 is a wasteful number, since it uses less digits than its factorization.

1231223404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9929256 (or 9929254 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 1231223404 is about 35088.7931396906. The cubic root of 1231223404 is about 1071.7963838325.

Adding to 1231223404 its reverse (4043221321), we get a palindrome (5274444725).

The spelling of 1231223404 in words is "one billion, two hundred thirty-one million, two hundred twenty-three thousand, four hundred four".