101220169 has 2 divisors, whose sum is σ = 101220170. Its totient is φ = 101220168.

The previous prime is 101220157. The next prime is 101220233. The reversal of 101220169 is 961022101.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88115769 + 13104400 = 9387^2 + 3620^2 .

It is a cyclic number.

It is not a de Polignac number, because 101220169 - 2⁵ = 101220137 is a prime.

It is a super-2 number, since 2×101220169² = 20491045224777122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (101220869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50610084 + 50610085.

It is an arithmetic number, because the mean of its divisors is an integer number (50610085).

Almost surely, 2^101220169 is an apocalyptic number.

It is an amenable number.

101220169 is a deficient number, since it is larger than the sum of its proper divisors (1).

101220169 is an equidigital number, since it uses as much as digits as its factorization.

101220169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 101220169 is about 10060.8234752430. The cubic root of 101220169 is about 466.0390976424.

The spelling of 101220169 in words is "one hundred one million, two hundred twenty thousand, one hundred sixty-nine".