11215540203 has 32 divisors (see below), whose sum is σ = 18105970176. Its totient is φ = 6028451328.

The previous prime is 11215540187. The next prime is 11215540249. The reversal of 11215540203 is 30204551211.

It is a happy number.

It is not a de Polignac number, because 11215540203 - 2⁴ = 11215540187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11215540103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 696400 + ... + 712322.

It is an arithmetic number, because the mean of its divisors is an integer number (565811568).

Almost surely, 2^11215540203 is an apocalyptic number.

11215540203 is a deficient number, since it is larger than the sum of its proper divisors (6890429973).

11215540203 is a wasteful number, since it uses less digits than its factorization.

11215540203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17923.

The product of its (nonzero) digits is 1200, while the sum is 24.

The spelling of 11215540203 in words is "eleven billion, two hundred fifteen million, five hundred forty thousand, two hundred three".