10121122321 has 2 divisors, whose sum is σ = 10121122322. Its totient is φ = 10121122320.

The previous prime is 10121122313. The next prime is 10121122421. The reversal of 10121122321 is 12322112101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5839252225 + 4281870096 = 76415^2 + 65436^2 .

It is a cyclic number.

It is not a de Polignac number, because 10121122321 - 2³ = 10121122313 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10121122295 and 10121122304.

It is not a weakly prime, because it can be changed into another prime (10121122301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060561160 + 5060561161.

It is an arithmetic number, because the mean of its divisors is an integer number (5060561161).

Almost surely, 2^10121122321 is an apocalyptic number.

It is an amenable number.

10121122321 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121122321 is an equidigital number, since it uses as much as digits as its factorization.

10121122321 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 16.

Adding to 10121122321 its reverse (12322112101), we get a palindrome (22443234422).

The spelling of 10121122321 in words is "ten billion, one hundred twenty-one million, one hundred twenty-two thousand, three hundred twenty-one".