2121000220069 has 2 divisors, whose sum is σ = 2121000220070. Its totient is φ = 2121000220068.

The previous prime is 2121000220019. The next prime is 2121000220121. The reversal of 2121000220069 is 9600220001212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2035578467169 + 85421752900 = 1426737^2 + 292270^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121000220069 - 2¹⁵ = 2121000187301 is a prime.

It is a super-2 number, since 2×2121000220069² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2121000220019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060500110034 + 1060500110035.

It is an arithmetic number, because the mean of its divisors is an integer number (1060500110035).

Almost surely, 2^{2121000220069} is an apocalyptic number.

It is an amenable number.

2121000220069 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121000220069 is an equidigital number, since it uses as much as digits as its factorization.

2121000220069 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The spelling of 2121000220069 in words is "two trillion, one hundred twenty-one billion, two hundred twenty thousand, sixty-nine".