1223431013444 has 6 divisors (see below), whose sum is σ = 2141004273534. Its totient is φ = 611715506720.

The previous prime is 1223431013443. The next prime is 1223431013447. The reversal of 1223431013444 is 4443101343221.

It can be written as a sum of positive squares in only one way, i.e., 775963668544 + 447467344900 = 880888^2 + 668930^2 .

It is a super-2 number, since 2×1223431013444² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1223431013444.

It is not an unprimeable number, because it can be changed into a prime (1223431013443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 152928876677 + ... + 152928876684.

It is an arithmetic number, because the mean of its divisors is an integer number (356834045589).

Almost surely, 2^{1223431013444} is an apocalyptic number.

It is an amenable number.

1223431013444 is a deficient number, since it is larger than the sum of its proper divisors (917573260090).

1223431013444 is a wasteful number, since it uses less digits than its factorization.

1223431013444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305857753365 (or 305857753363 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 32.

Adding to 1223431013444 its reverse (4443101343221), we get a palindrome (5666532356665).

The spelling of 1223431013444 in words is "one trillion, two hundred twenty-three billion, four hundred thirty-one million, thirteen thousand, four hundred forty-four".