10021012221 has 16 divisors (see below), whose sum is σ = 14751636480. Its totient is φ = 6000166320.

The previous prime is 10021012217. The next prime is 10021012237. The reversal of 10021012221 is 12221012001.

10021012221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 10021012221 - 2² = 10021012217 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10021012197 and 10021012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021012201) 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 15 ways as a sum of consecutive naturals, for example, 1826581 + ... + 1832058.

It is an arithmetic number, because the mean of its divisors is an integer number (921977280).

Almost surely, 2^10021012221 is an apocalyptic number.

10021012221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10021012221 is a deficient number, since it is larger than the sum of its proper divisors (4730624259).

10021012221 is a wasteful number, since it uses less digits than its factorization.

10021012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3658736.

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 10021012221 its reverse (12221012001), we get a palindrome (22242024222).

The spelling of 10021012221 in words is "ten billion, twenty-one million, twelve thousand, two hundred twenty-one".