101222130521 has 2 divisors, whose sum is σ = 101222130522. Its totient is φ = 101222130520.

The previous prime is 101222130517. The next prime is 101222130557. The reversal of 101222130521 is 125031222101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91726602496 + 9495528025 = 302864^2 + 97445^2 .

It is a cyclic number.

It is not a de Polignac number, because 101222130521 - 2² = 101222130517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 101222130493 and 101222130502.

It is not a weakly prime, because it can be changed into another prime (101222130511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50611065260 + 50611065261.

It is an arithmetic number, because the mean of its divisors is an integer number (50611065261).

Almost surely, 2^101222130521 is an apocalyptic number.

It is an amenable number.

101222130521 is a deficient number, since it is larger than the sum of its proper divisors (1).

101222130521 is an equidigital number, since it uses as much as digits as its factorization.

101222130521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 101222130521 its reverse (125031222101), we get a palindrome (226253352622).

The spelling of 101222130521 in words is "one hundred one billion, two hundred twenty-two million, one hundred thirty thousand, five hundred twenty-one".