21002022010049 has 2 divisors, whose sum is σ = 21002022010050. Its totient is φ = 21002022010048.

The previous prime is 21002022010009. The next prime is 21002022010141. The reversal of 21002022010049 is 94001022020012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15290782377649 + 5711239632400 = 3910343^2 + 2389820^2 .

It is a cyclic number.

It is not a de Polignac number, because 21002022010049 - 2³² = 20997727042753 is a prime.

It is not a weakly prime, because it can be changed into another prime (21002022010009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10501011005024 + 10501011005025.

It is an arithmetic number, because the mean of its divisors is an integer number (10501011005025).

Almost surely, 2^{21002022010049} is an apocalyptic number.

It is an amenable number.

21002022010049 is a deficient number, since it is larger than the sum of its proper divisors (1).

21002022010049 is an equidigital number, since it uses as much as digits as its factorization.

21002022010049 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 23.

The spelling of 21002022010049 in words is "twenty-one trillion, two billion, twenty-two million, ten thousand, forty-nine".