21023210002789 has 2 divisors, whose sum is σ = 21023210002790. Its totient is φ = 21023210002788.

The previous prime is 21023210002777. The next prime is 21023210002801. The reversal of 21023210002789 is 98720001232012.

It is a balanced prime because it is at equal distance from previous prime (21023210002777) and next prime (21023210002801).

It can be written as a sum of positive squares in only one way, i.e., 13057454520100 + 7965755482689 = 3613510^2 + 2822367^2 .

It is a cyclic number.

It is not a de Polignac number, because 21023210002789 - 2¹⁷ = 21023209871717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21023210102789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511605001394 + 10511605001395.

It is an arithmetic number, because the mean of its divisors is an integer number (10511605001395).

Almost surely, 2^{21023210002789} is an apocalyptic number.

It is an amenable number.

21023210002789 is a deficient number, since it is larger than the sum of its proper divisors (1).

21023210002789 is an equidigital number, since it uses as much as digits as its factorization.

21023210002789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The spelling of 21023210002789 in words is "twenty-one trillion, twenty-three billion, two hundred ten million, two thousand, seven hundred eighty-nine".