10021320221 has 8 divisors (see below), whose sum is σ = 10943069088. Its totient is φ = 9101358000.

The previous prime is 10021320217. The next prime is 10021320223. The reversal of 10021320221 is 12202312001.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 10021320221 - 2² = 10021320217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021320196 and 10021320205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021320223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434915 + ... + 457376.

It is an arithmetic number, because the mean of its divisors is an integer number (1367883636).

Almost surely, 2^10021320221 is an apocalyptic number.

10021320221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10021320221 is a deficient number, since it is larger than the sum of its proper divisors (921748867).

10021320221 is a wasteful number, since it uses less digits than its factorization.

10021320221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 893323.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 10021320221 its reverse (12202312001), we get a palindrome (22223632222).

The spelling of 10021320221 in words is "ten billion, twenty-one million, three hundred twenty thousand, two hundred twenty-one".