11251020203 has 4 divisors (see below), whose sum is σ = 11367010200. Its totient is φ = 11135030208.

The previous prime is 11251020191. The next prime is 11251020211. The reversal of 11251020203 is 30202015211.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 11251020203 - 2¹⁰ = 11251019179 is a prime.

It is a super-2 number, since 2×11251020203² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11251020233) 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, 57994853 + ... + 57995046.

It is an arithmetic number, because the mean of its divisors is an integer number (2841752550).

Almost surely, 2^11251020203 is an apocalyptic number.

11251020203 is a deficient number, since it is larger than the sum of its proper divisors (115989997).

11251020203 is an equidigital number, since it uses as much as digits as its factorization.

11251020203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115989996.

The product of its (nonzero) digits is 120, while the sum is 17.

Adding to 11251020203 its reverse (30202015211), we get a palindrome (41453035414).

The spelling of 11251020203 in words is "eleven billion, two hundred fifty-one million, twenty thousand, two hundred three".