101216305 has 8 divisors (see below), whose sum is σ = 121629672. Its totient is φ = 80859648.

The previous prime is 101216303. The next prime is 101216309. The reversal of 101216305 is 503612101.

It can be written as a sum of positive squares in 4 ways, for example, as 6718464 + 94497841 = 2592^2 + 9721^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101216305 - 2¹ = 101216303 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101216303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10144 + ... + 17473.

It is an arithmetic number, because the mean of its divisors is an integer number (15203709).

Almost surely, 2^101216305 is an apocalyptic number.

It is an amenable number.

101216305 is a deficient number, since it is larger than the sum of its proper divisors (20413367).

101216305 is an equidigital number, since it uses as much as digits as its factorization.

101216305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28355.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 101216305 is about 10060.6314414156. The cubic root of 101216305 is about 466.0331673422.

Adding to 101216305 its reverse (503612101), we get a palindrome (604828406).

The spelling of 101216305 in words is "one hundred one million, two hundred sixteen thousand, three hundred five".