10221161056 has 24 divisors (see below), whose sum is σ = 21306612600. Its totient is φ = 4809957888.

The previous prime is 10221161047. The next prime is 10221161057. The reversal of 10221161056 is 65016112201.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 10221161056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221161057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9393906 + ... + 9394993.

It is an arithmetic number, because the mean of its divisors is an integer number (887775525).

Almost surely, 2^10221161056 is an apocalyptic number.

10221161056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

10221161056 is an abundant number, since it is smaller than the sum of its proper divisors (11085451544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10221161056 is a wasteful number, since it uses less digits than its factorization.

10221161056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18788926 (or 18788918 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 10221161056 its reverse (65016112201), we get a palindrome (75237273257).

The spelling of 10221161056 in words is "ten billion, two hundred twenty-one million, one hundred sixty-one thousand, fifty-six".