10221243345 has 12 divisors (see below), whose sum is σ = 17716821876. Its totient is φ = 5451329760.

The previous prime is 10221243341. The next prime is 10221243391. The reversal of 10221243345 is 54334212201.

10221243345 is a `hidden beast` number, since 1 + 0 + 221 + 2 + 433 + 4 + 5 = 666.

10221243345 is digitally balanced in base 3, 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 2 ways, for example, as 6104609424 + 4116633921 = 78132^2 + 64161^2 .

It is not a de Polignac number, because 10221243345 - 2² = 10221243341 is a prime.

It is not an unprimeable number, because it can be changed into a prime (10221243341) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113569326 + ... + 113569415.

It is an arithmetic number, because the mean of its divisors is an integer number (1476401823).

Almost surely, 2^10221243345 is an apocalyptic number.

10221243345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10221243345 is a deficient number, since it is larger than the sum of its proper divisors (7495578531).

10221243345 is a wasteful number, since it uses less digits than its factorization.

10221243345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227138752 (or 227138749 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

Adding to 10221243345 its reverse (54334212201), we get a palindrome (64555455546).

The spelling of 10221243345 in words is "ten billion, two hundred twenty-one million, two hundred forty-three thousand, three hundred forty-five".