10231221021 has 12 divisors (see below), whose sum is σ = 15868832832. Its totient is φ = 5846411928.

The previous prime is 10231220983. The next prime is 10231221047. The reversal of 10231221021 is 12012213201.

It is not a de Polignac number, because 10231221021 - 2¹¹ = 10231218973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10231222021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34799925 + ... + 34800218.

It is an arithmetic number, because the mean of its divisors is an integer number (1322402736).

Almost surely, 2^10231221021 is an apocalyptic number.

It is an amenable number.

10231221021 is a deficient number, since it is larger than the sum of its proper divisors (5637611811).

10231221021 is an equidigital number, since it uses as much as digits as its factorization.

10231221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69600160 (or 69600153 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 10231221021 its reverse (12012213201), we get a palindrome (22243434222).

The spelling of 10231221021 in words is "ten billion, two hundred thirty-one million, two hundred twenty-one thousand, twenty-one".