10213222021 has 4 divisors (see below), whose sum is σ = 10269648844. Its totient is φ = 10156795200.

The previous prime is 10213222007. The next prime is 10213222091. The reversal of 10213222021 is 12022231201.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1842984900 + 8370237121 = 42930^2 + 91489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10213222021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10213221986 and 10213222004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10213222091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28213140 + ... + 28213501.

It is an arithmetic number, because the mean of its divisors is an integer number (2567412211).

Almost surely, 2^10213222021 is an apocalyptic number.

It is an amenable number.

10213222021 is a deficient number, since it is larger than the sum of its proper divisors (56426823).

10213222021 is an equidigital number, since it uses as much as digits as its factorization.

10213222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56426822.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 10213222021 its reverse (12022231201), we get a palindrome (22235453222).

The spelling of 10213222021 in words is "ten billion, two hundred thirteen million, two hundred twenty-two thousand, twenty-one".