101221133 has 4 divisors (see below), whose sum is σ = 109007388. Its totient is φ = 93434880.

The previous prime is 101221103. The next prime is 101221147. The reversal of 101221133 is 331122101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23833924 + 77387209 = 4882^2 + 8797^2 .

It is a cyclic number.

It is not a de Polignac number, because 101221133 - 2²² = 97026829 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101221103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3893108 + ... + 3893133.

It is an arithmetic number, because the mean of its divisors is an integer number (27251847).

Almost surely, 2^101221133 is an apocalyptic number.

101221133 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

101221133 is a deficient number, since it is larger than the sum of its proper divisors (7786255).

101221133 is an equidigital number, since it uses as much as digits as its factorization.

101221133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7786254.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 101221133 is about 10060.8713837321. The cubic root of 101221133 is about 466.0405771245.

Adding to 101221133 its reverse (331122101), we get a palindrome (432343234).

The spelling of 101221133 in words is "one hundred one million, two hundred twenty-one thousand, one hundred thirty-three".