1131221100331 has 8 divisors (see below), whose sum is σ = 1360867489280. Its totient is φ = 918585555048.

The previous prime is 1131221100311. The next prime is 1131221100421. The reversal of 1131221100331 is 1330011221311.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1131221100331 - 2¹¹ = 1131221098283 is a prime.

It is a super-2 number, since 2×1131221100331² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1131221100299 and 1131221100308.

It is not an unprimeable number, because it can be changed into a prime (1131221100311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4252710771 + ... + 4252711036.

It is an arithmetic number, because the mean of its divisors is an integer number (170108436160).

Almost surely, 2^{1131221100331} is an apocalyptic number.

1131221100331 is a deficient number, since it is larger than the sum of its proper divisors (229646388949).

1131221100331 is an equidigital number, since it uses as much as digits as its factorization.

1131221100331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8505421833.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1131221100331 its reverse (1330011221311), we get a palindrome (2461232321642).

The spelling of 1131221100331 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-one million, one hundred thousand, three hundred thirty-one".