10120010210521 has 2 divisors, whose sum is σ = 10120010210522. Its totient is φ = 10120010210520.

The previous prime is 10120010210461. The next prime is 10120010210533. The reversal of 10120010210521 is 12501201002101.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10017952963225 + 102057247296 = 3165115^2 + 319464^2 .

It is a cyclic number.

It is not a de Polignac number, because 10120010210521 - 2¹⁷ = 10120010079449 is a prime.

It is a super-2 number, since 2×10120010210521² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 10120010210495 and 10120010210504.

It is not a weakly prime, because it can be changed into another prime (10120010250521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5060005105260 + 5060005105261.

It is an arithmetic number, because the mean of its divisors is an integer number (5060005105261).

Almost surely, 2^{10120010210521} is an apocalyptic number.

It is an amenable number.

10120010210521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10120010210521 is an equidigital number, since it uses as much as digits as its factorization.

10120010210521 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 10120010210521 its reverse (12501201002101), we get a palindrome (22621211212622).

The spelling of 10120010210521 in words is "ten trillion, one hundred twenty billion, ten million, two hundred ten thousand, five hundred twenty-one".