21011101000069 has 2 divisors, whose sum is σ = 21011101000070. Its totient is φ = 21011101000068.

The previous prime is 21011100999961. The next prime is 21011101000129. The reversal of 21011101000069 is 96000010111012.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17023339624225 + 3987761375844 = 4125935^2 + 1996938^2 .

It is a cyclic number.

It is not a de Polignac number, because 21011101000069 - 2¹¹ = 21011100998021 is a prime.

It is a super-2 number, since 2×21011101000069² (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 (21011101000469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10505550500034 + 10505550500035.

It is an arithmetic number, because the mean of its divisors is an integer number (10505550500035).

Almost surely, 2^{21011101000069} is an apocalyptic number.

It is an amenable number.

21011101000069 is a deficient number, since it is larger than the sum of its proper divisors (1).

21011101000069 is an equidigital number, since it uses as much as digits as its factorization.

21011101000069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 22.

The spelling of 21011101000069 in words is "twenty-one trillion, eleven billion, one hundred one million, sixty-nine", and thus it is an aban number.