10220231221 has 2 divisors, whose sum is σ = 10220231222. Its totient is φ = 10220231220.

The previous prime is 10220231183. The next prime is 10220231237. The reversal of 10220231221 is 12213202201.

It is a happy number.

It is an a-pointer prime, because the next prime (10220231237) can be obtained adding 10220231221 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10139483025 + 80748196 = 100695^2 + 8986^2 .

It is an emirp because it is prime and its reverse (12213202201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10220231221 - 2⁷ = 10220231093 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10220231195 and 10220231204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10220231821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110115610 + 5110115611.

It is an arithmetic number, because the mean of its divisors is an integer number (5110115611).

Almost surely, 2^10220231221 is an apocalyptic number.

It is an amenable number.

10220231221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10220231221 is an equidigital number, since it uses as much as digits as its factorization.

10220231221 is an odious number, because the sum of its binary digits is odd.

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

Adding to 10220231221 its reverse (12213202201), we get a palindrome (22433433422).

The spelling of 10220231221 in words is "ten billion, two hundred twenty million, two hundred thirty-one thousand, two hundred twenty-one".