11111000000203 has 2 divisors, whose sum is σ = 11111000000204. Its totient is φ = 11111000000202.

The previous prime is 11111000000153. The next prime is 11111000000209. The reversal of 11111000000203 is 30200000011111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 11111000000203 - 2³⁷ = 10973561046731 is a prime.

It is a super-2 number, since 2×11111000000203² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11111000000203.

It is not a weakly prime, because it can be changed into another prime (11111000000209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555500000101 + 5555500000102.

It is an arithmetic number, because the mean of its divisors is an integer number (5555500000102).

Almost surely, 2^{11111000000203} is an apocalyptic number.

11111000000203 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111000000203 is an equidigital number, since it uses as much as digits as its factorization.

11111000000203 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6, while the sum is 10.

Adding to 11111000000203 its reverse (30200000011111), we get a palindrome (41311000011314).

The spelling of 11111000000203 in words is "eleven trillion, one hundred eleven billion, two hundred three", and thus it is an aban number.