10221404644 has 12 divisors (see below), whose sum is σ = 19513590768. Its totient is φ = 4646093000.

The previous prime is 10221404621. The next prime is 10221404647. The reversal of 10221404644 is 44640412201.

It is a super-2 number, since 2×10221404644² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10221404647) 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, 116152282 + ... + 116152369.

It is an arithmetic number, because the mean of its divisors is an integer number (1626132564).

Almost surely, 2^10221404644 is an apocalyptic number.

It is an amenable number.

10221404644 is a deficient number, since it is larger than the sum of its proper divisors (9292186124).

10221404644 is a wasteful number, since it uses less digits than its factorization.

10221404644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232304666 (or 232304664 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

Adding to 10221404644 its reverse (44640412201), we get a palindrome (54861816845).

The spelling of 10221404644 in words is "ten billion, two hundred twenty-one million, four hundred four thousand, six hundred forty-four".