10020122521 has 2 divisors, whose sum is σ = 10020122522. Its totient is φ = 10020122520.

The previous prime is 10020122503. The next prime is 10020122531. The reversal of 10020122521 is 12522102001.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7842873600 + 2177248921 = 88560^2 + 46661^2 .

It is a cyclic number.

It is not a de Polignac number, because 10020122521 - 2³³ = 1430187929 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10020122495 and 10020122504.

It is not a weakly prime, because it can be changed into another prime (10020122531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010061260 + 5010061261.

It is an arithmetic number, because the mean of its divisors is an integer number (5010061261).

Almost surely, 2^10020122521 is an apocalyptic number.

It is an amenable number.

10020122521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10020122521 is an equidigital number, since it uses as much as digits as its factorization.

10020122521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 16.

Adding to 10020122521 its reverse (12522102001), we get a palindrome (22542224522).

The spelling of 10020122521 in words is "ten billion, twenty million, one hundred twenty-two thousand, five hundred twenty-one".