1131213111321 has 32 divisors (see below), whose sum is σ = 1561247690368. Its totient is φ = 727995340800.

The previous prime is 1131213111313. The next prime is 1131213111419. The reversal of 1131213111321 is 1231113121311.

It is not a de Polignac number, because 1131213111321 - 2³ = 1131213111313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1131213111221) 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, 11680146 + ... + 11776596.

It is an arithmetic number, because the mean of its divisors is an integer number (48788990324).

Almost surely, 2^{1131213111321} is an apocalyptic number.

It is an amenable number.

1131213111321 is a deficient number, since it is larger than the sum of its proper divisors (430034579047).

1131213111321 is a wasteful number, since it uses less digits than its factorization.

1131213111321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97321.

The product of its digits is 108, while the sum is 21.

Adding to 1131213111321 its reverse (1231113121311), we get a palindrome (2362326232632).

The spelling of 1131213111321 in words is "one trillion, one hundred thirty-one billion, two hundred thirteen million, one hundred eleven thousand, three hundred twenty-one".