10255521221 has 16 divisors (see below), whose sum is σ = 11690939520. Its totient is φ = 8905110720.

The previous prime is 10255521197. The next prime is 10255521223. The reversal of 10255521221 is 12212555201.

It is a happy number.

10255521221 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10255521221 - 2¹⁴ = 10255504837 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10255521223) 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 in 15 ways as a sum of consecutive naturals, for example, 150791 + ... + 207963.

It is an arithmetic number, because the mean of its divisors is an integer number (730683720).

Almost surely, 2^10255521221 is an apocalyptic number.

10255521221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10255521221 is a deficient number, since it is larger than the sum of its proper divisors (1435418299).

10255521221 is a wasteful number, since it uses less digits than its factorization.

10255521221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57916.

The product of its (nonzero) digits is 2000, while the sum is 26.

The spelling of 10255521221 in words is "ten billion, two hundred fifty-five million, five hundred twenty-one thousand, two hundred twenty-one".