100203013 has 4 divisors (see below), whose sum is σ = 102335040. Its totient is φ = 98070988.

The previous prime is 100203001. The next prime is 100203023. The reversal of 100203013 is 310302001.

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: 310302001 = 29 ⋅10700069.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-100203013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100203023) 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, 1065943 + ... + 1066036.

It is an arithmetic number, because the mean of its divisors is an integer number (25583760).

Almost surely, 2^100203013 is an apocalyptic number.

It is an amenable number.

100203013 is a deficient number, since it is larger than the sum of its proper divisors (2132027).

100203013 is an equidigital number, since it uses as much as digits as its factorization.

100203013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2132026.

The product of its (nonzero) digits is 18, while the sum is 10.

The square root of 100203013 is about 10010.1455034380. The cubic root of 100203013 is about 464.4727720034.

Adding to 100203013 its reverse (310302001), we get a palindrome (410505014).

The spelling of 100203013 in words is "one hundred million, two hundred three thousand, thirteen".