10120102120021 has 2 divisors, whose sum is σ = 10120102120022. Its totient is φ = 10120102120020.

The previous prime is 10120102120013. The next prime is 10120102120049. The reversal of 10120102120021 is 12002120102101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9962949339396 + 157152780625 = 3156414^2 + 396425^2 .

It is a cyclic number.

It is not a de Polignac number, because 10120102120021 - 2³ = 10120102120013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 10120102119983 and 10120102120010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10120102120001) 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, 5060051060010 + 5060051060011.

It is an arithmetic number, because the mean of its divisors is an integer number (5060051060011).

Almost surely, 2^{10120102120021} is an apocalyptic number.

It is an amenable number.

10120102120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

10120102120021 is an equidigital number, since it uses as much as digits as its factorization.

10120102120021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 10120102120021 its reverse (12002120102101), we get a palindrome (22122222222122).

The spelling of 10120102120021 in words is "ten trillion, one hundred twenty billion, one hundred two million, one hundred twenty thousand, twenty-one".