100241021 has 4 divisors (see below), whose sum is σ = 100499100. Its totient is φ = 99982944.

The previous prime is 100240999. The next prime is 100241077. The reversal of 100241021 is 120142001.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50608996 + 49632025 = 7114^2 + 7045^2 .

It is a cyclic number.

It is not a de Polignac number, because 100241021 - 2⁶ = 100240957 is a prime.

It is a super-2 number, since 2×100241021² = 20096524582244882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 100240993 and 100241011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100241821) 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, 128456 + ... + 129233.

It is an arithmetic number, because the mean of its divisors is an integer number (25124775).

Almost surely, 2^100241021 is an apocalyptic number.

It is an amenable number.

100241021 is a deficient number, since it is larger than the sum of its proper divisors (258079).

100241021 is an equidigital number, since it uses as much as digits as its factorization.

100241021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258078.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 100241021 is about 10012.0437973473. The cubic root of 100241021 is about 464.5314909613.

Adding to 100241021 its reverse (120142001), we get a palindrome (220383022).

The spelling of 100241021 in words is "one hundred million, two hundred forty-one thousand, twenty-one".