10021221223 has 24 divisors (see below), whose sum is σ = 11015636688. Its totient is φ = 9111278592.

The previous prime is 10021221191. The next prime is 10021221239. The reversal of 10021221223 is 32212212001.

It is a happy number.

It is not a de Polignac number, because 10021221223 - 2⁵ = 10021221191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10021221197 and 10021221206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021221323) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3719865 + ... + 3722557.

It is an arithmetic number, because the mean of its divisors is an integer number (458984862).

Almost surely, 2^10021221223 is an apocalyptic number.

10021221223 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

10021221223 is a deficient number, since it is larger than the sum of its proper divisors (994415465).

10021221223 is a wasteful number, since it uses less digits than its factorization.

10021221223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3043 (or 3030 counting only the distinct ones).

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

Adding to 10021221223 its reverse (32212212001), we get a palindrome (42233433224).

The spelling of 10021221223 in words is "ten billion, twenty-one million, two hundred twenty-one thousand, two hundred twenty-three".