100021193 has 4 divisors (see below), whose sum is σ = 100127760. Its totient is φ = 99914628.

The previous prime is 100021177. The next prime is 100021199. The reversal of 100021193 is 391120001.

It is a happy number.

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: 391120001 = 431 ⋅907471.

It is a cyclic number.

It is not a de Polignac number, because 100021193 - 2⁴ = 100021177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (100021199) 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, 51863 + ... + 53756.

It is an arithmetic number, because the mean of its divisors is an integer number (25031940).

Almost surely, 2^100021193 is an apocalyptic number.

It is an amenable number.

100021193 is a deficient number, since it is larger than the sum of its proper divisors (106567).

100021193 is an equidigital number, since it uses as much as digits as its factorization.

100021193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106566.

The product of its (nonzero) digits is 54, while the sum is 17.

The square root of 100021193 is about 10001.0595938630. The cubic root of 100021193 is about 464.1916707759.

Adding to 100021193 its reverse (391120001), we get a palindrome (491141194).

The spelling of 100021193 in words is "one hundred million, twenty-one thousand, one hundred ninety-three".