1131011111203 has 4 divisors (see below), whose sum is σ = 1131896790720. Its totient is φ = 1130125431688.

The previous prime is 1131011111201. The next prime is 1131011111233. The reversal of 1131011111203 is 3021111101311.

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 1131011111203 - 2¹ = 1131011111201 is a prime.

It is a super-2 number, since 2×1131011111203² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131011111201) 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, 442837843 + ... + 442840396.

It is an arithmetic number, because the mean of its divisors is an integer number (282974197680).

Almost surely, 2^{1131011111203} is an apocalyptic number.

1131011111203 is a deficient number, since it is larger than the sum of its proper divisors (885679517).

1131011111203 is an equidigital number, since it uses as much as digits as its factorization.

1131011111203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 885679516.

The product of its (nonzero) digits is 18, while the sum is 16.

Adding to 1131011111203 its reverse (3021111101311), we get a palindrome (4152122212514).

The spelling of 1131011111203 in words is "one trillion, one hundred thirty-one billion, eleven million, one hundred eleven thousand, two hundred three".