101521045 has 4 divisors (see below), whose sum is σ = 121825260. Its totient is φ = 81216832.

The previous prime is 101521039. The next prime is 101521087. The reversal of 101521045 is 540125101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 540125101 = 457 ⋅1181893.

It can be written as a sum of positive squares in 2 ways, for example, as 25796241 + 75724804 = 5079^2 + 8702^2 .

It is a cyclic number.

It is not a de Polignac number, because 101521045 - 2³ = 101521037 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10152100 + ... + 10152109.

It is an arithmetic number, because the mean of its divisors is an integer number (30456315).

Almost surely, 2^101521045 is an apocalyptic number.

It is an amenable number.

101521045 is a deficient number, since it is larger than the sum of its proper divisors (20304215).

101521045 is an equidigital number, since it uses as much as digits as its factorization.

101521045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20304214.

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 101521045 is about 10075.7652314849. The cubic root of 101521045 is about 466.5004064762.

Adding to 101521045 its reverse (540125101), we get a palindrome (641646146).

The spelling of 101521045 in words is "one hundred one million, five hundred twenty-one thousand, forty-five".