1231221013404 has 48 divisors (see below), whose sum is σ = 2972402528256. Its totient is φ = 396246513600.

The previous prime is 1231221013391. The next prime is 1231221013433. The reversal of 1231221013404 is 4043101221321.

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, 3679267 + ... + 3999930.

It is an arithmetic number, because the mean of its divisors is an integer number (61925052672).

Almost surely, 2^{1231221013404} is an apocalyptic number.

It is an amenable number.

1231221013404 is an abundant number, since it is smaller than the sum of its proper divisors (1741181514852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231221013404 is a wasteful number, since it uses less digits than its factorization.

1231221013404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7679666 (or 7679664 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

Adding to 1231221013404 its reverse (4043101221321), we get a palindrome (5274322234725).

The spelling of 1231221013404 in words is "one trillion, two hundred thirty-one billion, two hundred twenty-one million, thirteen thousand, four hundred four".