1131823205121 has 32 divisors (see below), whose sum is σ = 1742023895040. Its totient is φ = 640257577344.

The previous prime is 1131823205063. The next prime is 1131823205129. The reversal of 1131823205121 is 1215023281311.

It is not a de Polignac number, because 1131823205121 - 2²¹ = 1131821107969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1131823205129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6333826 + ... + 6510068.

It is an arithmetic number, because the mean of its divisors is an integer number (54438246720).

Almost surely, 2^{1131823205121} is an apocalyptic number.

It is an amenable number.

1131823205121 is a deficient number, since it is larger than the sum of its proper divisors (610200689919).

1131823205121 is a wasteful number, since it uses less digits than its factorization.

1131823205121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 179325.

The product of its (nonzero) digits is 2880, while the sum is 30.

Adding to 1131823205121 its reverse (1215023281311), we get a palindrome (2346846486432).

The spelling of 1131823205121 in words is "one trillion, one hundred thirty-one billion, eight hundred twenty-three million, two hundred five thousand, one hundred twenty-one".