101521660 has 12 divisors (see below), whose sum is σ = 213195528. Its totient is φ = 40608656.

The previous prime is 101521649. The next prime is 101521669. The reversal of 101521660 is 66125101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101521669) 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, 2538022 + ... + 2538061.

It is an arithmetic number, because the mean of its divisors is an integer number (17766294).

Almost surely, 2^101521660 is an apocalyptic number.

101521660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

101521660 is an abundant number, since it is smaller than the sum of its proper divisors (111673868).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

101521660 is a wasteful number, since it uses less digits than its factorization.

101521660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5076092 (or 5076090 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 101521660 is about 10075.7957502125. The cubic root of 101521660 is about 466.5013484719.

Adding to 101521660 its reverse (66125101), we get a palindrome (167646761).

The spelling of 101521660 in words is "one hundred one million, five hundred twenty-one thousand, six hundred sixty".