1210200212128 has 12 divisors (see below), whose sum is σ = 2382581667690. Its totient is φ = 605100106048.

The previous prime is 1210200212087. The next prime is 1210200212129. The reversal of 1210200212128 is 8212120020121.

It can be written as a sum of positive squares in only one way, i.e., 1209058583184 + 1141628944 = 1099572^2 + 33788^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1210200212099 and 1210200212108.

It is not an unprimeable number, because it can be changed into a prime (1210200212129) by changing a digit.

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 as a sum of consecutive naturals, namely, 18909378283 + ... + 18909378346.

Almost surely, 2^{1210200212128} is an apocalyptic number.

It is an amenable number.

1210200212128 is a deficient number, since it is larger than the sum of its proper divisors (1172381455562).

1210200212128 is an equidigital number, since it uses as much as digits as its factorization.

1210200212128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37818756639 (or 37818756631 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 22.

Adding to 1210200212128 its reverse (8212120020121), we get a palindrome (9422320232249).

The spelling of 1210200212128 in words is "one trillion, two hundred ten billion, two hundred million, two hundred twelve thousand, one hundred twenty-eight".