101321521 has 4 divisors (see below), whose sum is σ = 115796032. Its totient is φ = 86847012.

The previous prime is 101321497. The next prime is 101321527. The reversal of 101321521 is 125123101.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 101321521 - 2⁷ = 101321393 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 101321495 and 101321504.

It is not an unprimeable number, because it can be changed into a prime (101321527) 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, 7237245 + ... + 7237258.

It is an arithmetic number, because the mean of its divisors is an integer number (28949008).

Almost surely, 2^101321521 is an apocalyptic number.

It is an amenable number.

101321521 is a deficient number, since it is larger than the sum of its proper divisors (14474511).

101321521 is an equidigital number, since it uses as much as digits as its factorization.

101321521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14474510.

The product of its (nonzero) digits is 60, while the sum is 16.

The square root of 101321521 is about 10065.8591784308. The cubic root of 101321521 is about 466.1945944460.

Adding to 101321521 its reverse (125123101), we get a palindrome (226444622).

The spelling of 101321521 in words is "one hundred one million, three hundred twenty-one thousand, five hundred twenty-one".