21000310201069 has 2 divisors, whose sum is σ = 21000310201070. Its totient is φ = 21000310201068.

The previous prime is 21000310201021. The next prime is 21000310201081. The reversal of 21000310201069 is 96010201300012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11049042480100 + 9951267720969 = 3324010^2 + 3154563^2 .

It is a cyclic number.

It is not a de Polignac number, because 21000310201069 - 2⁷ = 21000310200941 is a prime.

It is a super-2 number, since 2×21000310201069² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21000310201369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10500155100534 + 10500155100535.

It is an arithmetic number, because the mean of its divisors is an integer number (10500155100535).

Almost surely, 2^{21000310201069} is an apocalyptic number.

It is an amenable number.

21000310201069 is a deficient number, since it is larger than the sum of its proper divisors (1).

21000310201069 is an equidigital number, since it uses as much as digits as its factorization.

21000310201069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The spelling of 21000310201069 in words is "twenty-one trillion, three hundred ten million, two hundred one thousand, sixty-nine".