1312100123228 has 12 divisors (see below), whose sum is σ = 2300210676960. Its totient is φ = 654897072672.

The previous prime is 1312100123227. The next prime is 1312100123231. The reversal of 1312100123228 is 8223210012131.

It is a junction number, because it is equal to n+sod(n) for n = 1312100123197 and 1312100123206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1312100123227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288244676 + ... + 288249227.

It is an arithmetic number, because the mean of its divisors is an integer number (191684223080).

Almost surely, 2^{1312100123228} is an apocalyptic number.

It is an amenable number.

1312100123228 is a deficient number, since it is larger than the sum of its proper divisors (988110553732).

1312100123228 is a wasteful number, since it uses less digits than its factorization.

1312100123228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576494476 (or 576494474 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

Adding to 1312100123228 its reverse (8223210012131), we get a palindrome (9535310135359).

The spelling of 1312100123228 in words is "one trillion, three hundred twelve billion, one hundred million, one hundred twenty-three thousand, two hundred twenty-eight".