101066221 has 4 divisors (see below), whose sum is σ = 101113600. Its totient is φ = 101018844.

The previous prime is 101066213. The next prime is 101066227. The reversal of 101066221 is 122660101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122660101 = 691 ⋅177511.

It is a cyclic number.

It is not a de Polignac number, because 101066221 - 2³ = 101066213 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101066227) 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 3 ways as a sum of consecutive naturals, for example, 20331 + ... + 24808.

It is an arithmetic number, because the mean of its divisors is an integer number (25278400).

Almost surely, 2^101066221 is an apocalyptic number.

It is an amenable number.

101066221 is a deficient number, since it is larger than the sum of its proper divisors (47379).

101066221 is an equidigital number, since it uses as much as digits as its factorization.

101066221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47378.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 101066221 is about 10053.1696991546. The cubic root of 101066221 is about 465.8027080252.

The spelling of 101066221 in words is "one hundred one million, sixty-six thousand, two hundred twenty-one".