10121124521 has 2 divisors, whose sum is σ = 10121124522. Its totient is φ = 10121124520.

The previous prime is 10121124509. The next prime is 10121124551. The reversal of 10121124521 is 12542112101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8278998121 + 1842126400 = 90989^2 + 42920^2 .

It is a cyclic number.

It is not a de Polignac number, because 10121124521 - 2⁶ = 10121124457 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10121124493 and 10121124502.

It is not a weakly prime, because it can be changed into another prime (10121124551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060562260 + 5060562261.

It is an arithmetic number, because the mean of its divisors is an integer number (5060562261).

Almost surely, 2^10121124521 is an apocalyptic number.

It is an amenable number.

10121124521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10121124521 is an equidigital number, since it uses as much as digits as its factorization.

10121124521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 20.

Adding to 10121124521 its reverse (12542112101), we get a palindrome (22663236622).

The spelling of 10121124521 in words is "ten billion, one hundred twenty-one million, one hundred twenty-four thousand, five hundred twenty-one".