10223210021 has 2 divisors, whose sum is σ = 10223210022. Its totient is φ = 10223210020.

The previous prime is 10223210017. The next prime is 10223210071. The reversal of 10223210021 is 12001232201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7707084100 + 2516125921 = 87790^2 + 50161^2 .

It is a cyclic number.

It is not a de Polignac number, because 10223210021 - 2² = 10223210017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10223209978 and 10223210005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10223210071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5111605010 + 5111605011.

It is an arithmetic number, because the mean of its divisors is an integer number (5111605011).

Almost surely, 2^10223210021 is an apocalyptic number.

It is an amenable number.

10223210021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10223210021 is an equidigital number, since it uses as much as digits as its factorization.

10223210021 is an evil number, because the sum of its binary digits is even.

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

Adding to 10223210021 its reverse (12001232201), we get a palindrome (22224442222).

The spelling of 10223210021 in words is "ten billion, two hundred twenty-three million, two hundred ten thousand, twenty-one".