1010000120021 has 2 divisors, whose sum is σ = 1010000120022. Its totient is φ = 1010000120020.

The previous prime is 1010000119963. The next prime is 1010000120053. The reversal of 1010000120021 is 1200210000101.

1010000120021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1008194719921 + 1805400100 = 1004089^2 + 42490^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1010000120021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1010000119990 and 1010000120008.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1010000120071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505000060010 + 505000060011.

It is an arithmetic number, because the mean of its divisors is an integer number (505000060011).

Almost surely, 2^{1010000120021} is an apocalyptic number.

It is an amenable number.

1010000120021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1010000120021 is an equidigital number, since it uses as much as digits as its factorization.

1010000120021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4, while the sum is 8.

Adding to 1010000120021 its reverse (1200210000101), we get a palindrome (2210210120122).

The spelling of 1010000120021 in words is "one trillion, ten billion, one hundred twenty thousand, twenty-one".