100021361 has 4 divisors (see below), whose sum is σ = 109114224. Its totient is φ = 90928500.

The previous prime is 100021351. The next prime is 100021367. The reversal of 100021361 is 163120001.

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 a cyclic number.

It is not a de Polignac number, because 100021361 - 2⁶ = 100021297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100021367) 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, 4546415 + ... + 4546436.

It is an arithmetic number, because the mean of its divisors is an integer number (27278556).

Almost surely, 2^100021361 is an apocalyptic number.

100021361 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

100021361 is a deficient number, since it is larger than the sum of its proper divisors (9092863).

100021361 is an equidigital number, since it uses as much as digits as its factorization.

100021361 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9092862.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 100021361 is about 10001.0679929696. The cubic root of 100021361 is about 464.1919306680.

Adding to 100021361 its reverse (163120001), we get a palindrome (263141362).

The spelling of 100021361 in words is "one hundred million, twenty-one thousand, three hundred sixty-one".