10120203 has 12 divisors (see below), whose sum is σ = 15013648. Its totient is φ = 6564240.

The previous prime is 10120199. The next prime is 10120213. The reversal of 10120203 is 30202101.

It is a happy number.

It is not a de Polignac number, because 10120203 - 2² = 10120199 is a prime.

It is a super-2 number, since 2×10120203² = 204837017522418, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10120213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14863 + ... + 15528.

Almost surely, 2^10120203 is an apocalyptic number.

10120203 is a deficient number, since it is larger than the sum of its proper divisors (4893445).

10120203 is a wasteful number, since it uses less digits than its factorization.

10120203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30434 (or 30431 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 10120203 is about 3181.2266502090. The cubic root of 10120203 is about 216.3032648593.

Adding to 10120203 its reverse (30202101), we get a palindrome (40322304).

The spelling of 10120203 in words is "ten million, one hundred twenty thousand, two hundred three".