101647221 has 16 divisors (see below), whose sum is σ = 148014720. Its totient is φ = 61669440.

The previous prime is 101647213. The next prime is 101647243. The reversal of 101647221 is 122746101.

It is not a de Polignac number, because 101647221 - 2³ = 101647213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 101647191 and 101647200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101647201) 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 in 15 ways as a sum of consecutive naturals, for example, 15586 + ... + 21123.

It is an arithmetic number, because the mean of its divisors is an integer number (9250920).

Almost surely, 2^101647221 is an apocalyptic number.

It is an amenable number.

101647221 is a deficient number, since it is larger than the sum of its proper divisors (46367499).

101647221 is a wasteful number, since it uses less digits than its factorization.

101647221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36796.

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 101647221 is about 10082.0246478572. The cubic root of 101647221 is about 466.6935906802.

The spelling of 101647221 in words is "one hundred one million, six hundred forty-seven thousand, two hundred twenty-one".