101101221 has 48 divisors (see below), whose sum is σ = 165110400. Its totient is φ = 59181696.

The previous prime is 101101219. The next prime is 101101237. The reversal of 101101221 is 122101101.

It is a happy number.

It is not a de Polignac number, because 101101221 - 2¹ = 101101219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101101321) 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 47 ways as a sum of consecutive naturals, for example, 281440 + ... + 281798.

It is an arithmetic number, because the mean of its divisors is an integer number (3439800).

Almost surely, 2^101101221 is an apocalyptic number.

It is an amenable number.

101101221 is a deficient number, since it is larger than the sum of its proper divisors (64009179).

101101221 is a wasteful number, since it uses less digits than its factorization.

101101221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 487 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

The square root of 101101221 is about 10054.9102929862. The cubic root of 101101221 is about 465.8564721580.

Adding to 101101221 its reverse (122101101), we get a palindrome (223202322).

The spelling of 101101221 in words is "one hundred one million, one hundred one thousand, two hundred twenty-one".