20221211011709 has 2 divisors, whose sum is σ = 20221211011710. Its totient is φ = 20221211011708.

The previous prime is 20221211011627. The next prime is 20221211011783. The reversal of 20221211011709 is 90711011212202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14761371254809 + 5459839756900 = 3842053^2 + 2336630^2 .

It is a cyclic number.

It is not a de Polignac number, because 20221211011709 - 2⁴⁴ = 2629024967293 is a prime.

It is a super-2 number, since 2×20221211011709² (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 (20221211014709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10110605505854 + 10110605505855.

It is an arithmetic number, because the mean of its divisors is an integer number (10110605505855).

Almost surely, 2^{20221211011709} is an apocalyptic number.

It is an amenable number.

20221211011709 is a deficient number, since it is larger than the sum of its proper divisors (1).

20221211011709 is an equidigital number, since it uses as much as digits as its factorization.

20221211011709 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 29.

The spelling of 20221211011709 in words is "twenty trillion, two hundred twenty-one billion, two hundred eleven million, eleven thousand, seven hundred nine".