100101021 has 8 divisors (see below), whose sum is σ = 137075424. Its totient is φ = 64930320.

The previous prime is 100101013. The next prime is 100101041. The reversal of 100101021 is 120101001.

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

It is not a de Polignac number, because 100101021 - 2³ = 100101013 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100101041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 450795 + ... + 451016.

It is an arithmetic number, because the mean of its divisors is an integer number (17134428).

Almost surely, 2^100101021 is an apocalyptic number.

It is an amenable number.

100101021 is a deficient number, since it is larger than the sum of its proper divisors (36974403).

100101021 is an equidigital number, since it uses as much as digits as its factorization.

100101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 901851.

The product of its (nonzero) digits is 2, while the sum is 6.

The square root of 100101021 is about 10005.0497749886. The cubic root of 100101021 is about 464.3151300743.

Adding to 100101021 its reverse (120101001), we get a palindrome (220202022).

The spelling of 100101021 in words is "one hundred million, one hundred one thousand, twenty-one".