10010120021521 has 2 divisors, whose sum is σ = 10010120021522. Its totient is φ = 10010120021520.

The previous prime is 10010120021393. The next prime is 10010120021563. The reversal of 10010120021521 is 12512002101001.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8292303492496 + 1717816529025 = 2879636^2 + 1310655^2 .

It is a cyclic number.

It is not a de Polignac number, because 10010120021521 - 2⁷ = 10010120021393 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10010120021495 and 10010120021504.

It is not a weakly prime, because it can be changed into another prime (10010120021581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5005060010760 + 5005060010761.

It is an arithmetic number, because the mean of its divisors is an integer number (5005060010761).

Almost surely, 2^{10010120021521} is an apocalyptic number.

It is an amenable number.

10010120021521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10010120021521 is an equidigital number, since it uses as much as digits as its factorization.

10010120021521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 10010120021521 its reverse (12512002101001), we get a palindrome (22522122122522).

The spelling of 10010120021521 in words is "ten trillion, ten billion, one hundred twenty million, twenty-one thousand, five hundred twenty-one".