10221243221 has 8 divisors (see below), whose sum is σ = 11736784704. Its totient is φ = 8719542720.

The previous prime is 10221243209. The next prime is 10221243269. The reversal of 10221243221 is 12234212201.

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

It is a de Polignac number, because none of the positive numbers 2^k-10221243221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 10221243193 and 10221243202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10221243121) 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, 3458660 + ... + 3461613.

It is an arithmetic number, because the mean of its divisors is an integer number (1467098088).

Almost surely, 2^10221243221 is an apocalyptic number.

It is an amenable number.

10221243221 is a deficient number, since it is larger than the sum of its proper divisors (1515541483).

10221243221 is an equidigital number, since it uses as much as digits as its factorization.

10221243221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6920491.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 10221243221 its reverse (12234212201), we get a palindrome (22455455422).

The spelling of 10221243221 in words is "ten billion, two hundred twenty-one million, two hundred forty-three thousand, two hundred twenty-one".