101443121 has 4 divisors (see below), whose sum is σ = 109246452. Its totient is φ = 93639792.

The previous prime is 101443117. The next prime is 101443123. The reversal of 101443121 is 121344101.

It is a happy number.

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 58736896 + 42706225 = 7664^2 + 6535^2 .

It is a cyclic number.

It is not a de Polignac number, because 101443121 - 2² = 101443117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 101443121.

It is not an unprimeable number, because it can be changed into a prime (101443123) 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, 3901646 + ... + 3901671.

It is an arithmetic number, because the mean of its divisors is an integer number (27311613).

Almost surely, 2^101443121 is an apocalyptic number.

It is an amenable number.

101443121 is a deficient number, since it is larger than the sum of its proper divisors (7803331).

101443121 is an equidigital number, since it uses as much as digits as its factorization.

101443121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7803330.

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 101443121 is about 10071.8975868503. The cubic root of 101443121 is about 466.3810194651.

Adding to 101443121 its reverse (121344101), we get a palindrome (222787222).

The spelling of 101443121 in words is "one hundred one million, four hundred forty-three thousand, one hundred twenty-one".