1011821018203 has 2 divisors, whose sum is σ = 1011821018204. Its totient is φ = 1011821018202.

The previous prime is 1011821018161. The next prime is 1011821018207. The reversal of 1011821018203 is 3028101281101.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1011821018203 is a prime.

It is not a weakly prime, because it can be changed into another prime (1011821018207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 505910509101 + 505910509102.

It is an arithmetic number, because the mean of its divisors is an integer number (505910509102).

Almost surely, 2^{1011821018203} is an apocalyptic number.

1011821018203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1011821018203 is an equidigital number, since it uses as much as digits as its factorization.

1011821018203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 28.

Adding to 1011821018203 its reverse (3028101281101), we get a palindrome (4039922299304).

The spelling of 1011821018203 in words is "one trillion, eleven billion, eight hundred twenty-one million, eighteen thousand, two hundred three".