101201221 has 16 divisors (see below), whose sum is σ = 119112768. Its totient is φ = 84947200.

The previous prime is 101201209. The next prime is 101201227. The reversal of 101201221 is 122102101.

It is a cyclic number.

It is not a de Polignac number, because 101201221 - 2⁵ = 101201189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101201198 and 101201207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101201227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4806 + ... + 15016.

It is an arithmetic number, because the mean of its divisors is an integer number (7444548).

Almost surely, 2^101201221 is an apocalyptic number.

101201221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

101201221 is a deficient number, since it is larger than the sum of its proper divisors (17911547).

101201221 is a wasteful number, since it uses less digits than its factorization.

101201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10292.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 101201221 is about 10059.8817587485. The cubic root of 101201221 is about 466.0100156259.

Adding to 101201221 its reverse (122102101), we get a palindrome (223303322).

The spelling of 101201221 in words is "one hundred one million, two hundred one thousand, two hundred twenty-one".