108101021 has 4 divisors (see below), whose sum is σ = 123544032. Its totient is φ = 92658012.

The previous prime is 108100963. The next prime is 108101057. The reversal of 108101021 is 120101801.

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, and also an emirpimes, since its reverse is a distinct semiprime: 120101801 = 811 ⋅148091.

It is a cyclic number.

It is not a de Polignac number, because 108101021 - 2⁶ = 108100957 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 108100987 and 108101005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (108101321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7721495 + ... + 7721508.

It is an arithmetic number, because the mean of its divisors is an integer number (30886008).

Almost surely, 2^108101021 is an apocalyptic number.

It is an amenable number.

108101021 is a deficient number, since it is larger than the sum of its proper divisors (15443011).

108101021 is an equidigital number, since it uses as much as digits as its factorization.

108101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15443010.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 108101021 is about 10397.1640844992. The cubic root of 108101021 is about 476.3687515795.

Adding to 108101021 its reverse (120101801), we get a palindrome (228202822).

The spelling of 108101021 in words is "one hundred eight million, one hundred one thousand, twenty-one".