1121311320203 has 4 divisors (see below), whose sum is σ = 1121582894040. Its totient is φ = 1121039746368.

The previous prime is 1121311320169. The next prime is 1121311320211. The reversal of 1121311320203 is 3020231131211.

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 1121311320203 - 2¹⁸ = 1121311058059 is a prime.

It is a super-2 number, since 2×1121311320203² (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 (1121311820203) 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, 135780725 + ... + 135788982.

It is an arithmetic number, because the mean of its divisors is an integer number (280395723510).

Almost surely, 2^{1121311320203} is an apocalyptic number.

1121311320203 is a deficient number, since it is larger than the sum of its proper divisors (271573837).

1121311320203 is an equidigital number, since it uses as much as digits as its factorization.

1121311320203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 271573836.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1121311320203 its reverse (3020231131211), we get a palindrome (4141542451414).

The spelling of 1121311320203 in words is "one trillion, one hundred twenty-one billion, three hundred eleven million, three hundred twenty thousand, two hundred three".