25350221221201 has 4 divisors (see below), whose sum is σ = 25350340376304. Its totient is φ = 25350102066100.

The previous prime is 25350221221159. The next prime is 25350221221289. The reversal of 25350221221201 is 10212212205352.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25350221221201 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25350221221201.

It is not an unprimeable number, because it can be changed into a prime (25350221225201) 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, 59257855 + ... + 59684116.

It is an arithmetic number, because the mean of its divisors is an integer number (6337585094076).

Almost surely, 2^{25350221221201} is an apocalyptic number.

It is an amenable number.

25350221221201 is a deficient number, since it is larger than the sum of its proper divisors (119155103).

25350221221201 is a wasteful number, since it uses less digits than its factorization.

25350221221201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119155102.

The product of its (nonzero) digits is 4800, while the sum is 28.

Adding to 25350221221201 its reverse (10212212205352), we get a palindrome (35562433426553).

The spelling of 25350221221201 in words is "twenty-five trillion, three hundred fifty billion, two hundred twenty-one million, two hundred twenty-one thousand, two hundred one".