101221021169 has 2 divisors, whose sum is σ = 101221021170. Its totient is φ = 101221021168.

The previous prime is 101221021147. The next prime is 101221021201. The reversal of 101221021169 is 961120122101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 100069097569 + 1151923600 = 316337^2 + 33940^2 .

It is an emirp because it is prime and its reverse (961120122101) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-101221021169 is a prime.

It is a super-2 number, since 2×101221021169² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101221021129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610510584 + 50610510585.

It is an arithmetic number, because the mean of its divisors is an integer number (50610510585).

Almost surely, 2^101221021169 is an apocalyptic number.

It is an amenable number.

101221021169 is a deficient number, since it is larger than the sum of its proper divisors (1).

101221021169 is an equidigital number, since it uses as much as digits as its factorization.

101221021169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 101221021169 in words is "one hundred one billion, two hundred twenty-one million, twenty-one thousand, one hundred sixty-nine".