102112201221256 has 16 divisors (see below), whose sum is σ = 191460485434140. Its totient is φ = 51056071772160.

The previous prime is 102112201221133. The next prime is 102112201221257. The reversal of 102112201221256 is 652122102211201.

It can be written as a sum of positive squares in 2 ways, for example, as 98027622792100 + 4084578429156 = 9900890^2 + 2021034^2 .

It is not an unprimeable number, because it can be changed into a prime (102112201221257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22954096 + ... + 27039136.

Almost surely, 2^{102112201221256} is an apocalyptic number.

It is an amenable number.

102112201221256 is a deficient number, since it is larger than the sum of its proper divisors (89348284212884).

102112201221256 is a wasteful number, since it uses less digits than its factorization.

102112201221256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7209624 (or 7209620 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 28.

Adding to 102112201221256 its reverse (652122102211201), we get a palindrome (754234303432457).

The spelling of 102112201221256 in words is "one hundred two trillion, one hundred twelve billion, two hundred one million, two hundred twenty-one thousand, two hundred fifty-six".