1231303213444 has 24 divisors (see below), whose sum is σ = 2169350568000. Its totient is φ = 611489178720.

The previous prime is 1231303213433. The next prime is 1231303213477. The reversal of 1231303213444 is 4443123031321.

It is a super-2 number, since 2×1231303213444² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16167847 + ... + 16243825.

It is an arithmetic number, because the mean of its divisors is an integer number (90389607000).

Almost surely, 2^{1231303213444} is an apocalyptic number.

It is an amenable number.

1231303213444 is a deficient number, since it is larger than the sum of its proper divisors (938047354556).

1231303213444 is a wasteful number, since it uses less digits than its factorization.

1231303213444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103323 (or 103321 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 1231303213444 its reverse (4443123031321), we get a palindrome (5674426244765).

The spelling of 1231303213444 in words is "one trillion, two hundred thirty-one billion, three hundred three million, two hundred thirteen thousand, four hundred forty-four".