10142221021225 has 6 divisors (see below), whose sum is σ = 12576354066350. Its totient is φ = 8113776816960.

The previous prime is 10142221021199. The next prime is 10142221021313. The reversal of 10142221021225 is 52212012224101.

10142221021225 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 599391833616 + 9542829187609 = 774204^2 + 3089147^2 .

It is a de Polignac number, because none of the positive numbers 2^k-10142221021225 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25), and also a Moran number because the ratio is a prime number: 405688840849 = 10142221021225 / (1 + 0 + 1 + 4 + 2 + 2 + 2 + 1 + 0 + 2 + 1 + 2 + 2 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 10142221021225.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 202844420400 + ... + 202844420449.

Almost surely, 2^{10142221021225} is an apocalyptic number.

It is an amenable number.

10142221021225 is a deficient number, since it is larger than the sum of its proper divisors (2434133045125).

10142221021225 is an equidigital number, since it uses as much as digits as its factorization.

10142221021225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405688840859 (or 405688840854 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

Adding to 10142221021225 its reverse (52212012224101), we get a palindrome (62354233245326).

The spelling of 10142221021225 in words is "ten trillion, one hundred forty-two billion, two hundred twenty-one million, twenty-one thousand, two hundred twenty-five".