10221209999 has 128 divisors (see below), whose sum is σ = 15496427520. Its totient is φ = 6469632000.

The previous prime is 10221209987. The next prime is 10221210001. The reversal of 10221209999 is 99990212201.

It is a happy number.

10221209999 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 101100²-1.

It is not a de Polignac number, because 10221209999 - 2⁸ = 10221209743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221209909) 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 127 ways as a sum of consecutive naturals, for example, 32655467 + ... + 32655779.

It is an arithmetic number, because the mean of its divisors is an integer number (121065840).

Almost surely, 2^10221209999 is an apocalyptic number.

10221209999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

10221209999 is a deficient number, since it is larger than the sum of its proper divisors (5275217521).

10221209999 is a wasteful number, since it uses less digits than its factorization.

10221209999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 481.

The product of its (nonzero) digits is 52488, while the sum is 44.

The spelling of 10221209999 in words is "ten billion, two hundred twenty-one million, two hundred nine thousand, nine hundred ninety-nine".