101223145 has 8 divisors (see below), whose sum is σ = 121540104. Its totient is φ = 80930304.

The previous prime is 101223121. The next prime is 101223179. The reversal of 101223145 is 541322101.

It can be written as a sum of positive squares in 4 ways, for example, as 17464041 + 83759104 = 4179^2 + 9152^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 101223145 - 2⁵ = 101223113 is a prime.

It is a super-2 number, since 2×101223145² = 20492250167382050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5067 + ... + 15103.

It is an arithmetic number, because the mean of its divisors is an integer number (15192513).

Almost surely, 2^101223145 is an apocalyptic number.

It is an amenable number.

101223145 is a deficient number, since it is larger than the sum of its proper divisors (20316959).

101223145 is a wasteful number, since it uses less digits than its factorization.

101223145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12059.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 101223145 is about 10060.9713745741. The cubic root of 101223145 is about 466.0436649758.

Adding to 101223145 its reverse (541322101), we get a palindrome (642545246).

The spelling of 101223145 in words is "one hundred one million, two hundred twenty-three thousand, one hundred forty-five".