202122101689 has 2 divisors, whose sum is σ = 202122101690. Its totient is φ = 202122101688.

The previous prime is 202122101683. The next prime is 202122101761. The reversal of 202122101689 is 986101221202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 197928891664 + 4193210025 = 444892^2 + 64755^2 .

It is a cyclic number.

It is not a de Polignac number, because 202122101689 - 2⁹ = 202122101177 is a prime.

It is not a weakly prime, because it can be changed into another prime (202122101683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101061050844 + 101061050845.

It is an arithmetic number, because the mean of its divisors is an integer number (101061050845).

Almost surely, 2^202122101689 is an apocalyptic number.

It is an amenable number.

202122101689 is a deficient number, since it is larger than the sum of its proper divisors (1).

202122101689 is an equidigital number, since it uses as much as digits as its factorization.

202122101689 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 34.

The spelling of 202122101689 in words is "two hundred two billion, one hundred twenty-two million, one hundred one thousand, six hundred eighty-nine".