10021221205 has 16 divisors (see below), whose sum is σ = 12660926400. Its totient is φ = 7593505920.

The previous prime is 10021221191. The next prime is 10021221239. The reversal of 10021221205 is 50212212001.

It is a happy number.

It is not a de Polignac number, because 10021221205 - 2⁵ = 10021221173 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 754270 + ... + 767440.

It is an arithmetic number, because the mean of its divisors is an integer number (791307900).

Almost surely, 2^10021221205 is an apocalyptic number.

It is an amenable number.

10021221205 is a deficient number, since it is larger than the sum of its proper divisors (2639705195).

10021221205 is a wasteful number, since it uses less digits than its factorization.

10021221205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21204.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 10021221205 its reverse (50212212001), we get a palindrome (60233433206).

The spelling of 10021221205 in words is "ten billion, twenty-one million, two hundred twenty-one thousand, two hundred five".