1213453221404 has 24 divisors (see below), whose sum is σ = 2139160136400. Its totient is φ = 602276528000.

The previous prime is 1213453221401. The next prime is 1213453221443. The reversal of 1213453221404 is 4041223543121.

It is a super-3 number, since 3×1213453221404³ (a number of 37 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213453221401) 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, 1081847 + ... + 1896654.

It is an arithmetic number, because the mean of its divisors is an integer number (89131672350).

Almost surely, 2^{1213453221404} is an apocalyptic number.

It is an amenable number.

1213453221404 is a deficient number, since it is larger than the sum of its proper divisors (925706914996).

1213453221404 is a wasteful number, since it uses less digits than its factorization.

1213453221404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2979253 (or 2979251 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

Adding to 1213453221404 its reverse (4041223543121), we get a palindrome (5254676764525).

The spelling of 1213453221404 in words is "one trillion, two hundred thirteen billion, four hundred fifty-three million, two hundred twenty-one thousand, four hundred four".