1131031121011 has 4 divisors (see below), whose sum is σ = 1233852132024. Its totient is φ = 1028210110000.

The previous prime is 1131031121009. The next prime is 1131031121111. The reversal of 1131031121011 is 1101211301311.

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 1131031121011 - 2¹ = 1131031121009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131031121111) 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, 51410505490 + ... + 51410505511.

It is an arithmetic number, because the mean of its divisors is an integer number (308463033006).

Almost surely, 2^{1131031121011} is an apocalyptic number.

1131031121011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1131031121011 is a deficient number, since it is larger than the sum of its proper divisors (102821011013).

1131031121011 is a wasteful number, since it uses less digits than its factorization.

1131031121011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102821011012.

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

Adding to 1131031121011 its reverse (1101211301311), we get a palindrome (2232242422322).

The spelling of 1131031121011 in words is "one trillion, one hundred thirty-one billion, thirty-one million, one hundred twenty-one thousand, eleven".